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The average age of consisting doctors and lawyers is 40. If the doctors average age is 35and theIl.lawyers average age is 50, find the ratio of the number of doctors to the number oflawyers |
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Answer» Let , number of doctors= xnumber of lawyers= y Sum of age of x doctors÷ x = 35Sum of age of x doctors = 35x Sum of age of y lawyers÷ y = 50Sum of age of y lawyers= 50y [(sum of age of x doctors) + (sum of age of y lawyers)] ÷ ( x+y) = 40(35x+50y) ÷ (x+y) = 4035x+50y = 40(x+y)35x+50y = 40x +40y50y-40y=40x-35x10y=5x2y=1x2/1 = x/y x : y = 2 : 1 |
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