Question

If mean of the following data is 12, find the value of P.
X| 8 5 15 13 20
F| 4 10 8 P 7

Answer 1

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Here is your answer.

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Answer 2

The value of P is 6.

• Given data is :

X| 8 5 15 13 20

F| 4 10 8 P 7

• The mean of the given data is 12.
• Formula to find the mean is,

Mean = $\sum \frac{f_i.x_i}{f_i}$

• Substituting the values we get,

12 = $\frac{32+50+120+13P+140}{4+10+8+P+7}$

12(29+P) = 342 + 13P

348 + 12P = 342 + 13P

P = 6

• The value of P is 6.