PROBLEM # 1

In a town of 10,000 families it was found that 40% families buy newspaper A, 20% families buy newspaper B and 10% families buy newspaper C, 5% families buy A and B, 3% buy B and C and 4% buy A and C. If 2% families buy all 3 newspapers, find the number of families which buy (i) A only (ii) B only (iii) none of A, B and C.

PROBLEM # 2

The mean weight of 15 students is 112 lbs. The mean weight of 5 of them is 100 lbs and of another 3 is 125 lbs. What is the mean weight of the remaining students?

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Please send your solutions to both problems to anil@lokvani.com.

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If you need clarification on any problem, please contact anil@lokvani.com.

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SOLUTIONS TO PROBLEMS ON 8/28/03

PROBLEM # 1

Joseph drove for 6 hours at an average speed of 44 mph. He drove 52 mph during the first two hours of his trip. How fast did she drive during the last 4 hours?

SOLUTION

44 x 6 = 52 x 2 + S x 4
S = 40 mph.

PROBLEM # 2

If Megan were three times as old as she was six years ago, she will be three more than two times her current age. How old is Megan?

SOLUTION

3(x-6)=2x+3
x = 21 years.

Winners

Congratulations to H. Ajbani, S. Mallick, M. Mankad, A. Mathur, M. Misra, D. Padmanabhan, Rekha R., R. Saluja, G. Varghese and B. Venkataraman, who were all winners of the last puzzle. In this issue we bring you yet another challenge.

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