Question

There are 7 yellow marbles and 10 blue marbles in a bag. You randomly choose one of the marbles. What is the probability of choosing a yellow marble?

Answer 1

7/17

Explanation:

The probability of an event happening is the number of ways the desired event can happen divided by the total number of outcomes.

The total number of outcomes is 7 + 10 = 17.

The desired event is picking a yellow marble.

Since there are 7 yellow marbles, picking any of them is a desired outcome, so there are 7 desired outcomes.

p(yellow marble) = 7/17