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First and correct will be marked brainliest
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Step-by-step explanation:
mean of the given data =21.6
mean =product of sum of frequencies and sum of midvalues/sum of frequencies
sum of xi = 126
sum of fi = 25+p
mean = 126(25+p) / 25+p
21.6 = 126×(25+p) /25+p
21.6(25+p) = 126(25+p)
540+21.6p = 3150+126p
126p-21.6p = 540-3150
104.4p = 2610
p = 2160/104.4
p = 25
therefore p = 25
hope it helps you mate...
Answered by
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Step-by-step explanation:
i dont know I want to answer but u already marked BRAINLIEST
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