A mother her little daughter and her just born infant boy together stood on a weighing machine which shows 74kgs. How much does the daughter weight if the mother weights 46kg more than the combined weight of daughter and the infant and the infant weighs 60% less than the daughter ?
A. 9
B. 11
C. 10
D. Cannot be determined
Answer : C. 10
Explanation:
Daughter weight is x, infant weight is 60% less than daughter (i.e. 0.4x).
Mother weight is (x + 0.4x + 46).
Total weight = x + 0.4x + (x + 0.4x + 46) = 74.
Solving the eq. x = 10
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