Answer :

**(i)**

We have, N = 100

= = 50

The cumulative frequency just greater than is 65 then median Class 70-90, such that:

l = 70, f = 22, F = 43, h = 20

Median = l + × h

= 70 + × 20

= 70 +

= 70 + 6.36 = 76.36

**(ii)**

We have, N = 150

= = 7

The cumulative frequency is just more than is 90 then, the Median Class is 110-120 such that:

l = 110, f = 45, F = 45, h = 10

Median = l + × h

= 110 + × 10

= 110 +

= 110 + 6.67

= 116.67

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