# 30 children were asked about the number of hours they watched TV programmes last week. The results are recorded as under :

Number of hours 0-5 5-10 10-15 15-20

Frequency 8 16 4 2

Can we say that the number of children who watched TV for 10 or more hours a week is 22? Justify your answer.

**Solution:**

In the table provided,

Number of children who watched TV for 10 or more hours is 10-15 and 15-20 hours

So we can write it as

Number of children who watched TV for 10 or more hours is 10-15 and 15-20 hours = 4 + 2 = 6

So it is not true to say that the number of children who watched TV for 10 or more hours a week is 22.

Therefore, we cannot say that the number of children who watched TV for 10 or more hours a week is 22.

**✦ Try This: **50 children were asked about the number of hours they watched TV programmes last week. The results are recorded as under :

Number of hours | 0-5 | 5-10 | 10-15 | 15-20 |

Frequency | 5 | 10 | 15 | 20 |

Can we say that the number of children who watched TV for 10 or more hours a week is 12? Justify your answer.

In the table provided,

Number of children who watched TV for 10 or more hours is 10-15 and 15-20 hours

So we can write it as

Number of children who watched TV for 10 or more hours is 10-15 and 15-20 hours = 15 + 20 = 35

So it is not true to say that the number of children who watched TV for 10 or more hours a week is 12.

Therefore, we cannot say that the number of children who watched TV for 10 or more hours a week is 12.

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

**NCERT Exemplar Class 9 Maths Exercise 14.2 Problem 7**

## 30 children were asked about the number of hours they watched TV programmes last week. The results are recorded as under : Number of hours 0-5 5-10 10-15 15-20 Frequency 8 16 4 2 Can we say that the number of children who watched TV for 10 or more hours a week is 22? Justify your answer.

**Summary:**

30 children were asked about the number of hours they watched TV programmes last week. The results are recorded in a table. We cannot say that the number of children who watched TV for 10 or more hours a week is 22

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