Question

If the mean of the following frequency distribution

is 91, and sum of frequency is 150, find the missing

frequency x and y :

Class 0- 30 30-

60

60-

90

90-

120

120-

150

150-

180

Frequency 12 ,21 ,x ,52, y, 11
please tell how to simplify equation 1 and 2nd please tell this also

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Answer 1

Answer:

Here is your attachment

Step-by-step explanation:

Solving eqns. (i) and (ii),

x = 34 and y = 20