Question

What is the probability that rita selects a multiple of 3 from range of 1- 30, when each of the given number is equally likely to be selected?
1. 1/4
2. 3/4
3. 1/3
4. 2/3

Answer 1

Correct Answer - Option 3 : 1/3

Given:

Selecting = multiple of 3

Range = 1 - 30

Formula used:

Probability = Total number of outcomes/ Sample space

Calculation:

Possible outcomes = {3, 6, 9, 12, 15, 18, 21, 24, 27, 30}

⇒ Number of possible outcomes = 10

⇒ Probability = 10/ 30

∴ required probability is 1/3