Q7 of 71 Page 201

If the arithmetic mean of the following data is 7.5, then find the value of P.

We know that,


Where, = Mean, xi = values of x and fi = frequency for that x.




⇒ 307.5 + 7.5P = 303 + 9P


⇒ 1.5P = 4.5


⇒ P = 3


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