Question

a box contains 4 white balls and 6 yellow balls. A ball is drawn randomly from the box and is not replaced. What is the probability that both balls are white? A.) 3/25 B.) 8/45 C.) 2/15 D.) 4/25​

Answer 1

C

Explanation:

The question is actually, 2 balls are randomly taken and not replaced. What is the probability that both balls are white?

There are 4 while balls and 6 yellow balls. So total 10 balls.

The probability of a white ball at first draw is 4/10

** Since not replaced, so we have 1 less white ball and 1 less total ball. So there are now 3 white balls and 9 total balls.So:

The probability of a white ball at second draw is 3/9

We multiply both so: 4/10 * 3/9 = 2/15

Correct answer is C