The heights of boys and girls of 9th class of a school are given below
X 2 4 6 8 10 12
F 5 8 9 17 P 4
X bar = 9.2 find P
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Answer:
P = 144.5
Step-by-step explanation:
We are given with the following data below;
X f f * X
2 5 10
4 8 32
6 9 54
8 17 136
10 P 10*P
12 4 48
∑f = 43 + P ∑f*X = 280 + 10*P
Mean Formula, X bar =
9.2 =
9.2(43 + P) = 280 + 10*P
10*P - 9.2*P = 395.6 - 280
0.8*P = 115.6
P = = 144.5 .
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