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# In a sample study of 642 people, it was found that 514 people have a high school certificate. If a person is selected at random, the probability that the person has a high school certificate is :

a. 0.5

b. 0.6

c. 0.7

d. 0.8

**Solution:**

It is given that

Total number of people in sample study n(S) = 642

Number of people who have a high school certificate n(E) = 514

We know that

Probability that the person has a high school certificate P = n(E)/ n(S)

Substituting the values

= 514/642

= 0.8

Therefore, the probability that the person has a high school certificate is 0.8.

**✦ Try This: **In a sample study of 550 people, it was found that 415 people have a high school certificate. If a person is selected at random, the probability that the person has a high school certificate is :

**☛ Also Check:** NCERT Solutions for Class 9 Maths Chapter 14

**NCERT Exemplar Class 9 Maths Exercise 14.1 Problem 25**

## In a sample study of 642 people, it was found that 514 people have a high school certificate. If a person is selected at random, the probability that the person has a high school certificate is : a. 0.5, b. 0.6, c. 0.7, d. 0.8

**Summary:**

In a sample study of 642 people, it was found that 514 people have a high school certificate. If a person is selected at random, the probability that the person has a high school certificate is 0.8

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