Question

How many students finished the race within 1 minute?
(i)18
(ii)37
(iii)31
(iv)8​

Answer 1

Given : 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

To Find :  How many students finished the race within 1 minute?

(i)18

(ii)37

(iii)31

(iv)8​

Solution:

Time  (in sec)    f               cf

0-20                8                8

20-40              10                18

40-60              13                31

60-80               6                37

80-100              3               40

1 minute = 60 sec

Time less than 60 sec  = 31 Students

31  students finished the race within 1 minute

option iii) is correct

Learn More:

How many students finished the race within 1 minute?

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Answer 2

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