When the average age of a couple and their son was 42 years, the son married and got a child after one year. When the child was 5 years old, the average age of the family became 36 years. What was the age of daughterin law at the time of their marriage ?
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If the average of 5 consecutive integers is x then, find the average of next to next 5 consecutive integers.
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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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A batsman makes a score of 87 runs in the 17^{th} inning and thus increases his average by 3. Find his average after 17^{th} inning.
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If the arithmetic mean of 7, 5, 13, x and 9 is 10, then the value of x is :
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The average sale of car dealership was 15 cars per week. After a promotional scheme the average sale increased to 21 cars per week. The percentage increased in the sale of cars was
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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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30 pens and 75 pencils altogether were purchased for Rs. 510. If the average price of a pencil was Rs. 2, what was the average price of a pen ?
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The average age of 24 boys and their teacher is 15 years. When the teacher's age is excluded, the average age decreases by 1 year. The age of the teacher is :
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The average of 6 numbers is 7. The average of three numbers of them is 5. What will be the average of remaining numbers?
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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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