If the mean of
for following data is 21 find the value of p x is 10, 15, 25, 30 f 3, 5,2,5,5
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Step-by-step explanation:xf = 30, 75, 50, 150, 5p
Mean = summition xf ÷ summition f
21 = 300 + 5p ÷ 20
420 = 305 + 5p
115 = 5p
115 ÷ 5 = p
23 = p
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