Question

If mean of data is 20.2. find P
x 10 15 20 25 30
y 6 8 P 10 6​

Answer 1

Step-by-step explanation:

x y= f(x) x*f(x)

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10 6 = 60

15 8 = 120

20 p = 20p

25 10 = 250

30 6 = 180

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(30+p) (20p+610)

Mean = x*f(x)/f(x)

20.2 = (20p + 610) / (30+p)

606 + 20.2p = 20p + 610

0.2p = 4

p = 4/0.2 = 40/2 = 20