Question

.The arithmetic mean of the following distribution is 50. Find the missing frequency p.

C.I. 0-20 20-40 40-60 60-80 80-100

Frequency 7 6 9 13 P
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Answer 1

Hi guys here is your answer

Answer 2

Answer:

3.5

Step-by-step explanation:

take tital of fx and total of f. put into the formula and solve

mean = fx / f

50 = 1610 + 90 p / 35 + p

1750 - 1610 = 90 p - 50 p

140 = 40 p

p = 3.5