# CASE STUDY QUESTION 14-Class X-Maths

CASE STUDY QUESTION 14-Class X-Maths

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

**(a) Estimate the mean time taken by a student to finish the race.**

(i) 54 (ii) 63 (iii) 43 (iv) 50

**(b) What will be the upper limit of the modal class ?**

(i) 20 (ii) 40 (iii) 60 (iv) 80

**Sol:** (iii) 60

**(c) The construction of cumulative frequency table is useful in determining the**

(i) Mean (ii) Median

(iii) Mode (iv) All of the above

**Sol:** (ii) Median

**(d) The sum of lower limits of median class and modal class is**

(i) 60 (ii) 100 (iii) 80 (iv) 140

**(e) How many students finished the race within 1 minute?**

(i) 18 (ii) 37 (iii) 31 (iv) 8