The average height of 50 students in a class is 165 cm on a particular day, three students p,q,r are absent so the average of thr remaning students becomes 163cm. If the height of p and q is equal and height of r is 2 cm less than p,
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it will be the age of all three 34,34,32
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sum of height (50) = 50*165 = 8250 sum of height (47) = 47*163 = 7661 sum of the height of P, Q and R = 8250-7661 = 589 P+P+P-2 = 589 (as height of P is equal to Q and height of R = P -2) P = 197
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