Sum = Average × Number of values = 24 × 5 = 120
Boys:Girls = 3:4. If boys = 12, then 3 units = 12, so 1 unit = 4. Girls = 4 × 4 = 16
25% of 480 = (25/100) × 480 = 120
Speed = Distance/Time = 360/6 = 60 km/h
40% of x = 240 → (40/100) × x = 240 → x = 600
Average speed = Total distance / Total time = 240/4 = 60 km/h
Prime factorization: 12=2²×3, 18=2×3², 24=2³×3. LCM = 2³×3² = 8×9 = 72
Profit = 520 - 400 = 120. Profit % = (120/400) × 100 = 30%
Adding both equations: 2x = 14, so x = 7. Alternatively, (x+y) + (x-y) = 10+4 gives 2x = 14
40% of 500 = 200. 25% of 200 = 50. Or (0.25 × 0.40 × 500) = 50
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