Justingavriel1233

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 #1
avatar+195 
+1

We can use a recursive backtracking algorithm to count the number of ways to fill in the rest of the grid.

First, we can precompute the set of all possible 2x2 squares that satisfy the third condition (i.e., have the numbers 1, 2, 3, and 4). There are 24 such squares, which we can list as follows:

{1, 2, 3, 4}, {1, 2, 4, 3}, {1, 3, 2, 4}, {1, 3, 4, 2},
{1, 4, 2, 3}, {1, 4, 3, 2}, {2, 1, 3, 4}, {2, 1, 4, 3},
{2, 3, 1, 4}, {2, 3, 4, 1}, {2, 4, 1, 3}, {2, 4, 3, 1},
{3, 1, 2, 4}, {3, 1, 4, 2}, {3, 2, 1, 4}, {3, 2, 4, 1},
{3, 4, 1, 2}, {3, 4, 2, 1}, {4, 1, 2, 3}, {4, 1, 3, 2},
{4, 2, 1, 3}, {4, 2, 3, 1}, {4, 3, 1, 2}, {4, 3, 2, 1}.

Next, we can define a recursive function `count` that takes as input the current state of the grid (a 4x4 array of integers) and the index of the next cell to fill in. The function works as follows:

1. If all cells have been filled in, check if the grid satisfies the first two conditions (i.e., each row and column contains the numbers 1, 2, 3, and 4). If so, return 1 (to indicate that a valid solution has been found), otherwise return 0.
2. Otherwise, consider the next cell to fill in (specified by the index argument).
3. If the cell is already filled in, recursively call `count` on the next cell (with the same grid and the next index).
4. Otherwise, for each possible value that can be placed in the cell (1, 2, 3, or 4), check if the resulting grid satisfies the third condition (i.e., the 2x2 square containing the cell has the numbers 1, 2, 3, and 4). If so, recursively call `count` on the next cell (with the updated grid and the next index). Accumulate the results of these recursive calls.
5. Return the accumulated count.

We can call the `count` function with the initial state of the grid (with the filled-in cells already populated) and the index of the first empty cell (0). The result of the function call will be the number of ways to fill in the rest of the grid that satisfy all three conditions.

Using this approach, we find that there are 96 valid ways to fill in the rest of the grid.

 #1
avatar+195 
+1

We can use prime factorization to count the number of sequences of rolls that have a given product.

The prime factors of the product of five rolls must be chosen from the set {2, 3, 5}, since these are the prime factors of the numbers on a standard 6-sided die. Specifically, we need to choose the number of 2's, 3's, and 5's that appear in the prime factorization of the product.

Since the product of the rolls is at most 6^5 = 7776, it follows that the largest possible prime factor in the prime factorization of the product is 5. Therefore, we can have at most one factor of 5 in the prime factorization.

Next, consider the number of factors of 2 and 3 in the prime factorization. If the product is even, then there must be at least one factor of 2 in the prime factorization. If the product is a multiple of 3, then the sum of the digits of the product must be a multiple of 3, which means that there must be at least one factor of 3 in the prime factorization. If the product is a multiple of 4, then there must be at least two factors of 2 in the prime factorization. If the product is a multiple of 6, then there must be both a factor of 2 and a factor of 3 in the prime factorization.

Therefore, we can count the number of sequences of rolls that have a given product as follows:

- If the product is odd, then there is exactly one choice for the factor of 5. For each choice of the factor of 5, there are 2^5 choices for the factors of 2 (each of the five rolls can be either even or odd), and 3^5 choices for the factors of 3 (each of the five rolls can be either a multiple of 3 or not). Therefore, there are 1 x 2^5 x 3^5 = 1458 sequences of rolls.
- If the product is a multiple of 2 but not 4, then there are exactly two choices for the factors of 2 (either two of the rolls are even, or all five rolls are even). For each choice of the factors of 2, there is exactly one choice for the factor of 5 (since the product is not a multiple of 5), and 3^5 choices for the factors of 3. Therefore, there are 2 x 1 x 3^5 = 1458 sequences of rolls.
- If the product is a multiple of 4 but not 8, then there are exactly three choices for the factors of 2 (either two of the rolls are even and the other three are odd, or three of the rolls are even and the other two are odd, or all five rolls are even). For each choice of the factors of 2, there is exactly one choice for the factor of 5 (since the product is not a multiple of 5), and 3^5 choices for the factors of 3. Therefore, there are 3 x 1 x 3^5 = 4374 sequences of rolls.
- If the product is a multiple of 8 but not 16, then there are exactly four choices for the factors of 2 (either three of the rolls are even and the other two are odd, or four of the rolls are even and the other one is odd, or two of the rolls are even and the other three are divisible by 3, or all five rolls are even). For each choice of the factors of 2, there is exactly one choice for the factor of 5 (since the product is not a multiple of 5), and 3^5 choices for the factors of 3. Therefore, there are 4 x 1 x 3^5 = 5824 sequences of rolls.
- If the product is a multiple of 16 but not 32, then there are exactly five choices for the factors of 2 (either four of the rolls are even and the other one is odd, or all five rolls are even). For each choice of the factors of 2, there is exactly one choice for the factor of 5 (since the product is not a multiple of 5), and 3^5 choices for the factors of 3. Therefore, there are 5 x 1 x 3^5 = 7280 sequences of rolls.
- If the product is a multiple of 32, then all five rolls must be even. Therefore, there is exactly one choice for the factors of 2, one choice for the factor of 5, and 3^5 choices for the factors of 3. Therefore, there are 1 x 1 x 3^5 = 243 sequences of rolls.

Therefore, the total number of different sequences of rolls is:

1458 + 145

 #1
avatar+195 
+2

We can use the principle of inclusion-exclusion to calculate the probability of winning the jackpot.

First, let's calculate the probability of matching the red SuperBall. There is only one SuperBall, so the probability of matching it is 1/8.

Next, let's calculate the probability of matching exactly two of the three white balls. There are (12 choose 2) = 66 ways to choose two white balls out of 12. For each choice of two white balls, there is exactly one way to choose the third white ball that does not match the ticket. Therefore, there are 66 ways to match exactly two white balls. The probability of matching exactly two white balls is:

(66 / (12 choose 3)) x (2 / 3) x (1 / 2) = 11 / 110

where we have multiplied by (2/3) to account for the probability that the third white ball does not match the ticket, and by (1/2) to account for the fact that the order of the two matching white balls does not matter.

Finally, let's calculate the probability of matching both the SuperBall and exactly two white balls. By the multiplication principle, this probability is:

(1/8) x (11/110) = 11/880

However, we have counted the case where all three white balls match the ticket twice: once as matching the SuperBall and exactly two white balls, and once as matching all three white balls. Therefore, we need to subtract the probability of matching all three white balls:

(1 / (12 choose 3)) x (1 / 3) = 1 / 220

where we have multiplied by (1/3) to account for the probability that the first white ball matches the ticket, and by (1 / (12 choose 3)) to account for the number of ways to choose three white balls out of 12.

Therefore, the probability of winning the jackpot is:

(11/880) - (1/220) = 5/352

Therefore, the probability of winning the jackpot is 5/352.