The mean of the following frequency distribution is 78. Find the value of p.
Mean = 78 (Given)
According to the direct method
Mean = 
⇒ 2886 + 78p = 2665 + 95p
⇒ 17p = 221
Value of p is 13
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The mean of the following frequency distribution is 78. Find the value of p.
Mean = 78 (Given)
According to the direct method
Mean =
⇒ 2886 + 78p = 2665 + 95p
⇒ 17p = 221
Value of p is 13