Question

There are 10 marbles in a bag; 3 are red, 4 are green, and 3 are blue. What is the probability of pulling a red marble, putting it back in the bag, then pulling another red marble?

Answer 1

`(9)/(100)`

Explanation:

Since there are 10 marbles, that will be the denominator.

Since the question is telling us what will be the probability of taking a red marble out 2 times, we need to multiply 2 fractions.

So, since there are 3 red marbles this will be the numerator for both fractions.

`(3)/(10)`×
`(3)/(10)`=
`(9)/(100)`