saurabh's answer to Sid's Primary 5 Maths Fractions Singapore question.
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Let's say he has N nephews.
Sum of nephews age = 10*N
After including Andrew age AVG =14
Sum of nephews age +30 = 14*(N+1)
10*N+30= 14N + 14
N= 4
Andrew has 4 nephews
Sum of nephews age = 10*N
After including Andrew age AVG =14
Sum of nephews age +30 = 14*(N+1)
10*N+30= 14N + 14
N= 4
Andrew has 4 nephews
Date Posted:
2 years ago
Thanks a lot
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