+216 Maria has three identical apples and three identical oranges. How many ways are there for her to distribute the fruits among her four friends if she doesn't give Jacky any oranges? (Note: Maria takes none of the fruit herself, and some of her friends might not receive any fruit at all.)
+118667 Maria has three identical apples and three identical oranges. How many ways are there for her to distribute the fruits among her four friends if she doesn't give Jacky any oranges? (Note: Maria takes none of the fruit herself, and some of her friends might not receive any fruit at all.)
I have used what is called the 'Stars and Bars' method.
I get 200 ways
put the 3 apples in a row, they are the stars. Use bars to divide them into 4 piles, you will need 3 bars
So you have 3 apples and 3 bars so there are 6C3 places to put the bars = 20 possible ways to distribute the apples
now put the 3 oranges in a row (the new stars) Us bars to divide them into 3 piles, you will need 2 bars.
So you have 5C2 = 10 ways to distribute them
20*10 = 200 ways
