There are 15 red balls and 10 blue balls. 1) How many ways are there to...

Question

Question

There are 15 red balls and 10 blue balls.

1) How many ways are there to choose one ball to be placed on a chair and one ball to be placed on a desk?

(My original answer was 600)

2) How many ways are there to choose one ball to be placed on a chair and one ball to be placed on a desk if both balls cannot be the same color?

(My original answer was 150)

3) How many ways are there to choose one ball to be placed on a chair and one ball to be placed on a desk if both balls must be the same color?

(My original answer was 150)

Answer 1

Answer #1

Answer 2

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