Test Index

WAEC Mathematics 2020 Paper

© africaexams.com

Question : 36

Total: 48

A box contains 12 identical balls of which 5 are red, 4 blue, and the rest are green. If a ball is selected at random from the box, what is the probability that it is green?

$\,\frac{3}{4}$
$\,\frac{1}{2}$
$\,\frac{1}{3}$
$\,\frac{1}{4}$

Solution:

Concept:

Probability is the ratio of favorable outcomes to the total number of possible outcomes.

Explanation:

Total balls in the box

= 12

.

Red balls

= 5

, blue balls

= 4

.

Green balls

= 12 - 5 - 4 = 3

.

Probability of selecting a green ball

= \frac{\text{number of green balls}}{\text{total balls}}

.

P(\text{green}) = \frac{3}{12} = \frac{1}{4}

.

Answer:

D.

\frac{1}{4}

© africaexams.com

Go to Question:

Prev Question

Next Question