Question

Please help find the probability?!??

Answer 1

if there's originally 10 marbles in the bag and one is taken out without being replaced, then the chance of picking a yellow would be 1/9 as there would be one yellow and 9 in total for the second pick
so the answer is 1/9

Answer 2

There are 10 total marbles, 2 are yellow.

The probability of picking a yellow one first would be 2/10, which reduces to 1/5.

After the first pick there would be 9 marbles left with 1 yellow one.

The probability of picking that yellow one would be 1/9

The probability of picking both yellow would be 1/5 x 1/9 = 1/45