Question

Case Study Based- 4
100m RACE
A stopwatch was used to
find the time that it took a
group of students to run 100

Time (in sec.) 0-20 20-40 40-60 60-80 80-100 No. of students 8 10 13 6 3

a) Estimate the mean time taken by a student to finish the race. 1
(i)54 (ii)63 (iii)43 (iv)50
(b) What wiil be the upper limit of the modal class ? 1
(i)20 (ii)40 (iii)60 (iv)80
(c) The construction of cumulative frequency table is useful in determining the 1
(i)Mean (ii)Median (iii)Mode (iv)All of the above
(d) The sum of lower limits of median class and modal class is 1
(i)60 (ii)100 (iii)80 (iv)140
(e) How many students finished the race within 1 minute? 1
(i)18 (ii)37 (iii)31 (iv)8

answer fast but don't spam
reported brainlist get 1st answer ​

Answer 1

Answer:

oh

i can't understand dear sorry

Answer 2

Answer:

a) 43

b) 20

c) median

d)80

e) 31

please mark as a brainlest