Mathematics
NULL
Medium
Question
A couple and their daughter average 35 years now. In 15 years the mother's age will equal the sum of the father's and daughter's present ages. Find the mother's present age.
A
43 years
B
40 years
C
48 years
D
45 years
✓ Official correct answer
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A
43 years
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B
40 years
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C
48 years
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D
45 years
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Explanation
F+M+D = 105 and M+15 = F+D ⇒ 2M = 90 ⇒ M = 45 years.