1 . | Answer : Option C | Explanation : | Let the sum be Rs x. 4781.70 = x × 1.05 × 1.1 × 1.15 x=$4781.70\over1.05x1.1x1.15$=Rs 3600 | | | 2 . | Answer : Option B | Explanation : | Total number of ways without restriction = 6!, Total number of ways after taking two girls as one single entity = 5! Two girls can sit in 2! ways among themselves. Total number of ways that two girls don’t sit together = 6! – 5! × 2! = 480 | | | 3 . | Answer : Option D | Explanation : | | | | 4 . | Answer : Option B | Explanation : | LCM of 6, 8, 9, 12, and 18 is 72. In an hour, they will ring together =$3600\over72$=50 times | | | 5 . | Answer : Option C | Explanation : | Let initial price of one kg sugar be Rs100. Now, increased price of one kg sugar = Rs160 Rs160 —— 1 kg Rs 160-$1\over160$x100=$5\over8$kg Reduction=1-$5\over8$=$3\over8$kg In one kg, reduction is $3\over8$kg In 100 kg, reduction = $3\over8$x100=$300\over8$=37.5% other approach : $60\over100+60$x100=$75\over2$=37.5%
| | | 6 . | Answer : Option B | Explanation : | % profit = 35% Expenditure = Income ×$100\over100+%p$ Thus 91.8x$100\over135$Rs 68 lakh | | | 7 . | Answer : Option D | Explanation : | | | | 8 . | Answer : Option D | Explanation : | | | | 9 . | Answer : Option A | Explanation : | Let the expenditure be x. Income =Xx$100+25\over100$=1.25x %=$x\over1.25$x$100$=$100\over1.25$=80%
| | | 10 . | Answer : Option B | Explanation : | | | | |

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