Question

A box of colored pencil contains exactly 8 red pencils. the probability of choosing a red pencil from the box is 2/7. how many of the pencils in the box are not red?​

a)5
b)17
c)20
d)28

Answer 1

C

Explanation:

There are 28 pencils inside the bag.

If there are 8 red pencils and the probability of choosing it is 2/7 then the total number of pencils inside the box is equals to 8 (the number of red pencil) ÷ 2 (the probability of choosing a red pencil) × 7 (the possibility space).

`(8)/(2) * 7`

There 20 pencils that aren't red.

In getting the answer, just subtract the (number of red pencil) to the (total number of pencils in the bag.

28 - 8 = 20