Set 1: Probability (Beginner)

**Choice B is the best answer.** P = favorable/total = 5/21 = 5/21

Explanation

Answer: B

PROBLEM

A bag contains 21 balls, 5 of which are blue. What is the probability of randomly selecting a blue ball?

5/22

5/21

✓ Correct

21/5

6/21

Detailed Explanation

Choice B is the best answer. P = favorable/total = 5/21 = 5/21

Why others are wrong:

A: 5/22 is incorrect because it does not satisfy the equation.

C: 21/5 is incorrect because it does not satisfy the equation.

D: 6/21 is incorrect because it does not satisfy the equation.