Question

FIND The median

Marks. C.F
less than 10. 0
less than 30 10
less than 50 25
less than 70 43
less than 90. 65
less than 110. 87
less than 130. 96
less than 150. 100

Answer 1

Answer:

the median of the given data is 43.88 (approx)

Step-by-step explanation:

Marks           F              Cf

0-10              0              0

10-30           10             10

30-50          15             25

50-70          18             43

70-90          22            65

90-110         22             87

110-130         9              96

130-150        4              100

median = l +( n/2 -cf ) *h

n/2  = 100 /2 = 50

50- 70 is the median class

l= 50

h =70-50= 20

cf=15

f=18

median=50+ ( 50 -15/18) * 20

=50+ 35/18 *20

=50+700/18

=790/18

= 43.88 (approx)

hope it helps!!!!!