Find your Math Personality!

Find your Math Personality!

# The following table gives the number of pages written by Sarika for completing her own book for 30 days

Number of pages written per day 16-18 19-21 22-24 25-27 28-30

Number of days 1 3 4 9 13

Find the mean number of pages written per day.

**Solution:**

Given, the above data gives the number of pages written by Sarika for completing her own book for 30 days.

We have to find the mean number of pages written per day.

Number of pages written per day | Number of days (f) | Midpoint x | f × x |

16 - 18 | 1 | 17 | 17 |

19 - 21 | 3 | 20 | 60 |

22 - 24 | 4 | 23 | 92 |

25 - 27 | 9 | 26 | 234 |

28 - 30 | 13 | 29 | 377 |

Total | ∑f = 30 | ∑fx = 780 |

By direct method,

Mean = ∑fx / ∑f

From the table,

Mean = 780/30

= 78/3

= 26

Therefore, the mean is 26.

**✦ Try This: **The following table gives the number of pages written by Sarika for completing her own book for 30 days:

Number of pages written per day | 16-18 | 19-21 | 22-24 | 25-27 | 28-30 |

Number of days | 3 | 2 | 5 | 8 | 18 |

Find the mean number of pages written per day.

**☛ Also Check: **NCERT Solutions for Class 10 Maths Chapter 14

**NCERT Exemplar Class 10 Maths Exercise 13.3 Problem 4**

## The following table gives the number of pages written by Sarika for completing her own book for 30 days Number of pages written per day 16-18 19-21 22-24 25-27 28-30 Number of days 1 3 4 9 13

**Summary:**

The mean number of pages written per day by Sarika for completing her own book in 30 days is 26

**☛ Related Questions:**

- The daily income of a sample of 50 employees are tabulated as follows: Income (in Rs.) 1-200 201-400 . . . .
- An aircraft has 120 passenger seats. The number of seats occupied during 100 flights is given in the . . . .
- The weights (in kg) of 50 wrestlers are recorded in the following table: Weight (kg) 100-110 110-120 . . . .

Math worksheets and

visual curriculum

visual curriculum