Out of four numbers the average of the first three is 16 and that of the last three is 15. If the last number is 20, than first number is :
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The average (arithmetic mean) of 330, 360 and 390 is :
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2
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Sachin Tendulkar has a certain average for 11 innings. In the 12th innings he scores 120 runs and thereby increases his average by 5 runs. His new average is :
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3
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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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4
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The average of the first 100 positive integers is-
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5
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In a family, the average age of a father and a mother is 35 years. The average age of the father, mother and their only son is 27 years. What is the age of the son?
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6
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If the mean of 4 observations is 20, when a constant 'c' is added to each observation, the mean becomes 22. The value of c is :
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7
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19 people went to a hotel for combine dinner party 13 of them spent Rs. 79 each on their dinner and rest spent 4 more than the average expenditure of all the 19. What was the total money spent by them.
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8
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Mukesh has twice as much money as Soham. Soham has 50% more money than Pankaj. If the average money with them is Rs. 110, then Mukesh has :
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The average age of 3 children in a family is 20% of the average age of the father and the eldest child. The total age of the mother and the youngest child is 39 years. If the father's age is 26 years, what is the age of the second child ?
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What is the average of the first six (positive) odd number each of which is divisible by 7?
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