CSC
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Numerical Ability
Ratio and Proportion
A total of 324 coins of 20 paise and 25 paise make a sum of Rs. 71. The number of 25-paise coins is
A. 120 B. 124
C. 144 D. 200
Read Solution (Total 2)
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- Ans B.124
explanation:
Let the number of 20-paise coins be x. Then, number of 25-paise coins = (324 - x).
Therefore 0.20 x x + 0.25 (324 - x) = 71 20x + 25 (324 - x) = 7100
5x= 1000 x = 200. Hence, number of 25-paise coins = (324 - x) = 124. - 12 years agoHelpfull: Yes(13) No(2)
- (324-x)*20/100+x*25/100=71
x=124...
- 9 years agoHelpfull: Yes(2) No(0)
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