Suppose a bag of marbles has 4 green, 2 red, 5 yellow, 1 brown, and 7 blue marbles. what is the probability of picking a red marble?

Assuming that each marble can be picked with equal probability, we notice that there is a total of

marbles, of which 2 are red.

So, the probability of picking a red marble is

In fact, as in any other case of (finite) equidistribution, we used the formula

answer:

your answer is: c. 196 7/8 in^3.

answer: (3,11) is your answer.