AvenJohn

I don't really understand what you mean by "buy groceries for one week"

If it means buy one weeks worth of groceries, it would be reliable as the customers could have been first time or long term so there is no telling if there is any bias.

If it menas buy groceries every day for a week, then it would be biased as the customers generally would not come back every day for a week if they weren't happy with the store hours.

a) No, this statement is not valid. Although chinese food is the most popular type of food compared to the other types, it isn't the majority of the class.

b)

1. Chinese food is the most popular type of food.

2. Canadian food is the least popular type of food.

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Bring the 4.4 to the other side to get 1.2n<59.6. Then we can divide both sides by 1.2 to get n<149/3

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We can use PIE and complementary counting. The numbers that ARE divisible by 2,3,5,7 are going to be (divisible by 2)+(divisible by 3)+(divisible by 5)+(divisible by 7)-(divisible by 2*3)-(divisible by 2*5)-(divisible by 2*7)-(divisible by 3*5)-(divisible by 3*7)-(divisible by 5*7)+(divisible by 2*3*5)+(divisible by 2*3*7)+(divisible by 2*5*7)+(divisible by 3*5*7)-(divisible by 2*3*5*7). This yields 1010+673+404+288-336-202-144-134-96-57+67+48+28+19-9=1559

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If the mean of 6 numbers is 27, their total sum is 6*27=162. 162-23-16-30-33=60 so the sum of the other two numbers is 60. We know the 2 numbers differ by 2 so 2x-2=60 when x is the greater of the 2. That means x is 31 so one number is 31 and the other is 29. Once we remove the number 16, the total sum becomes 146. Therefore the arithmetic mean is 29.2.

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10 ways to pick pres

9 ways to pick secretary

8 ways to pick treasurer

7 ways to pick morale officer

6 ways to pick dog catcher

30240 ways

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1/2 because 1/2 are freshmand and the other 1/2 are sophomores.

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There are 9 1 digit numbers so that's 9 digits. After 49 2 digit numbers you are at 99 digits and the next digit you'll write is a 5 as in 59.

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If a is 5 and b is -5, the minimum value is -25

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Yes. 1/3=.3333333333 so 3/3=.999999999=1