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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
What will be the geometric mean of 'Q' and 'P - Q'.
75, 80, 95, ?, 155, 200
8 13 36 123 ? 2585
45, 59, 31, ?, 17, 87
10, ?, 50, 100, 250, 500
5, 19, 30, 43, 58, ?
13 19 32 52 ? 113
What will come in the place of questions (?) mark in the following questions.
1279, 1265, ? , 1225, 1193, 1149
Find the missing character.
124, 147, 176, 207, 244, ?