Govt Exams
Sum of 4 numbers = 35 × 4 = 140. Sum of 3 numbers = 28 + 36 + 42 = 106. Fourth number = 140 - 106 = 34.
Total initial = 78 × 5 = 390. After removing 68: 390 - 68 = 322. After adding 88: 322 + 88 = 410. New average = 410 ÷ 5 = 82.
Total weight = 3 × 70 = 210 kg. C's weight = 210 - 75 - 68 = 67 kg. Wait, option shows 69. Recalculating: 210 - 75 - 68 = 67. But if answer is A (69), total would be 207. Let me verify: 210 - 75 - 68 = 67 kg.
Sum needed for average 85 in 4 subjects = 4 × 85 = 340. Sum of 3 scores = 75 + 82 + 88 = 245. Fourth subject score = 340 - 245 = 95.
Total distance = 120 + 180 = 300 km. Total time = 2 + 3 = 5 hours. Average speed = 300/5 = 60 km/h.
Sum of 6 numbers = 6 × 18 = 108. Sum of 3 numbers = 3 × 24 = 72. Total sum = 180. Total numbers = 9. New average = 180/9 = 20.
Total cost = (10 × 50) + (15 × 40) = 500 + 600 = 1100. Total items = 25. Average = 1100/25 = ₹44.
Sum of 5 friends = 5 × 24 = 120. Sum of 4 friends = 4 × 22 = 88. Age of friend who left = 120 - 88 = 32 years.
Using SI = (P × R × T)/100; 800 = (4000 × R × 2)/100; R = 10% p.a.
SI = (20000 × 8 × 5)/100 = 8000. Amount = 20000 + 8000 = 28000