Q. 74.2( 9 Votes )

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

Answer :

We know that,

Where, = Mean, x_{i} = values of x and f_{i} = frequency for that x.

⇒ 307.5 + 7.5P = 303 + 9P

⇒ 1.5P = 4.5

⇒ P = 3

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