The average age of the boys in a class is 16 years and that of the girls is 15 years. The average age for the whole class is-
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Find the average increase rate, if increase in the population in the first year is 30% and that in the second year is 40%.
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2
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If the average of x and 1/x(X\( \ne \)0) is M, then the average of x2 and 1/x2 is :
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3
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The average of six number is x and the average of three of these is y. the average of the remaining three is z, then
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a, b, c, d, e, f, g are consecutive even numbers. j, k, l, m, n are consecutive odd numbers. The average of all the numbers is :
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5
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A shop of electronic goods is closed on Monday. The average daily sales for remaining six days of a week is Rs. 15,640 and the average sale of Tuesday to Saturday is Rs. 14,124. The sales on Sunday is -
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6
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The average of six numbers is x and the average of three of these is y. If the average of the remaining three is z, then-
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A library has an average of 510 visitors on Sundays and 240 on other days. The average number of visitors per day in a month of 30 days beginning with a Sunday is
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A passenger travels from Delhi to Merut at a speed of 30 kmph and return with a speed of 60 kmph. What is the average speed?
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9
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The mean weight of 100 students in a class is 46 kg. The mean weight of boys is 50 and of girls is 40 kg. Therefore, the number of boys is:
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The average age of 20 boys in a class is 12 years. 5 new boys are admitted to the class whose average age is 7 years. The average age of all the boys in the class becomes:
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