## Mathematics TERM II

## Statistics

## Class 10 Session 2021-2022

## Case Study Questions 03

**100 m Race:**

A stopwatch was used to find the time that it took a group of students to run 100 m.

Time (in sec.) | 0-20 | 20-40 | 40-60 | 60-80 | 80-100 |

No. of students | 8 | 10 | 13 | 6 | 3 |

1. The estimated mean time taken by a student to finish the race is

(a) 54

(b) 63

(c) 43

(d) 50

(c) 43

2. What will be the upper limit of the modal class?

(a) 20

(b) 40

(c) 60

(d) 80

(c) 60

3. The construction of cumulative frequency table is useful in determining the

(a) mean

(b) median

(c) mode

(d) All of the above

(b) median

4. The sum of lower limits of median class and modal class is

(a) 60

(b) 100

(c) 80

(d) 140

(c) 80

5. How many students finished the race within 1 minute?

(a) 18

(b) 37

(c) 31

(d) 8

(c) 30