If the average of x and 1/x(X\( \ne \)0) is M, then the average of x2 and 1/x^{2} is :
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In a set of three numbers, the average of first two numbers is 2, the average of the last two numbers is 3, and the average of the first and the last numbers is 4. What is the average of three numbers?
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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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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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A cricketer whose bowling average is 12.4 runs per wicket takes 5 wickets for 26 runs and thereby decreased his average by 0.4. The number of wickets taken by him the last match was
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The mean of 25 observations was found to be 78.4. But later on it was found that 96 were misread as 69. The correct means is
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Find the average of 1.11, 0.01, 0.101, 0.001, 0.11 = ?
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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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Ajit has a certain average for 9 innings. In the tenth innings, he scores 100 runs thereby increasing his average by 8 runs. His new average is:
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The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero ?
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The average age of students of a class is 15.8 years. The average age of boys in the class is 16.4 years and that of the girls is 15.4 years. The ratio of the number of boys to the number of girls in the class is
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