Question

Find the probability of drawing a black checker from a bag of 4 black checkers and 6 red checkers, not replacing it, and then drawing another black checker.

Answer 1

Answer: 2/15

Explanation:

When you first pull the black checker it will equal to 4/10 if you don't put the checker back in and pull another black checker it will equal to 3/9 because there is one less marble. Then you multiply 4/10 and 3/9 to get 2/15.