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sol a GP Prove that p2 Rn = S".27In a town of 10000 families it was found that 40% families buynewspaper A, 20% families buy newspaper B, 10% families buynewspaper C. 5% of families buy newspaper A and B, 3% offamilies buy newspaper B and C and 4% of families buynewspaper A and C. If 12% of families buy all the threenewspaper that find.(a) the number of families which buy newspaper A only.(b) the number of families which buy none of the newspaperA, B and C. |
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Answer» Total Number of Families (N) = 10,000a) Number of families which buy Newspaper A = 40%*N +5%N + 4%N +2%N = 40/100*10000 + 5/100*10000 + 4*100*10000 + 2/100*10000 = 10000/100(40+5+4+2) = 100(51) = 5100 b) Number of Families which doesn't buy Any NewsPaper = (100 - (40+20+10+5+3+4+2))%N = (100 - 84)%N = 16%N = 16/100*10000 = 16*100= 1600 |
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