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Number of boys in the class = 55 X (5/11) = 25 Number of girls in the class = 55 - 25 = 30 Let the average weight of a girl in the class = 'y' kg Then, average weight of a boy in the class = (y + 8) kg Total weight of all girls in the class = 30 X y = '30y' kg Total weight of all boys in the class = 25 X (y + 8) = (25y + 200) kg According to the question, (25y + 200):(30y) = 15:14 Or, 350y + 2800 = 450y So, y = 2800 ÷ 100 = 28 Therefore, average weight of a boy in the class = 28 + 8 = 36 kg
1120 / √x = 80 Then x = ?
116 ÷ 280 of 1/2 + 3/5 × 5/3 = ?
65% of ? = 50 + 20 × 4
Simplify the following questions:
(11) 8.5 × (121) 5.5 ÷ (1331) 5.5 = (11) ?
...17% of 250 + ? = 108
72 + 122 - 25% of 600 = ?
40 × 5 + 27) × 9 = ?
10% of 80% of 50% of ? = 4
Find the simplified value of the given expression:
(12 ÷ 3 of 2 + 11 of 2) ÷ 4
[(√576 × √144) ÷ √1296]2 = ? ÷ 3