There are 7 red skittles, 15 green skittles and 3 blue skittles in a bag.You reach into a bag and pick a skittle. You then put it back into the bag. You then reach into the bag and pick a skittle. What is the probability that you chose 2 green skittles? Reiny wrote prob(2 green)

Question

= (15/25)(15/25)
= 9/25 but i don't get why

Answer 1

What part don't you understand ?

there are 25 skittles, of which 15 are green
so prob of green = 15/25 = 3/5
since you are returning the one you picked, the second prob is the same as the first
so prob(2green)
= (15/25)(15/25)
= (3/5)(3/5)
= 9/25