Question

If the bowl contains 5 red marbles 7 blue marbles and 8 white marbles what is the probability you will draw a red marble when you pick one out?

5/20
15/20
7/20
2/5

Answer 1

`\displaystyle (5)/(20)`

Explanation:

We will put the number of wanted outcomes over the number of possible outcomes.

`\displaystyle \frac{\text{wanted outcomes}}{\text{possibly outcomes}} =\frac{\text{red marbles}}{\text{number of all marbles in the bowl}}=(5)/(5+7+8) =(5)/(20)`