The mean of the following frequency distribution is 25. Find the value of p
Class Interval .Frequency
0-10. 15
10-20. 20
20-30 35
30-40. p
40-50. 10
Answers
Answer:
P = 30 (。_。)
Step-by-step explanation:
mean = 25
C.I. fi xi di, a = 25 ui xifi
0 - 10 15 5 -20 -2 -30
10 - 20 20 15 -10 -1 -20
20 - 30 35 25 0 0 0
30 - 40 P 35 +10 +1 P
40 - 50 10 45 +20 +2 +20
mean = [h ( sum of xifi ) / sum of fi ] + a = 25
=> [10(30-P) / 80 + P] + 25 = 25
=> 300 - 10P = 0
=> P = 30
I hope u find it useful. (°ー°〃)