Find the value of p ,if 7:21 :: p:90
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7:21 :: p:90
7×90 = 21 × p
630 = 21 × p
630/21 = p
30 = p
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Step-by-step explanation:
product of mean = product of extreme
21×p = 7×90
p = 7×90/21
p =30
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