In Arun's opinion, his weight is greater than 65 kg but less than 72 kg. His brother doest not agree with Arun and he thinks that Arun's weight is greater than 60 kg but less than 70 kg. His mother's view is that his weight cannot be greater than 68 kg. If all are them are correct in their estimation, what is the average of different probable weights of Arun?
67 Kg
68 Kg
69 Kg
None Of These
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1
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There are two sections A and B of a class, consisting of 36 and 44 students' respectively. If the average weight of section A is 40kg and that of section B is 35kg, find the average weight of the whole class.
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2
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The average age of husband and his wife was 23 years at the time of their marriage. After five tears they have a oneyear old child. The average age of the family of three, when the child was born, was
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3
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The average of the largest and smallest 3 digits numbers formed by 0, 2 and 4 would be :
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4
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The mean of 100 observations was calculated as 40. It was founder later on that one of the observation was misread as 83 instead of 53. The correct mean is :
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5
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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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6
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The average of 10 items was found to be 80 but while calculating, one of the items was counted as 60 instead of 50. Then the correct average would have been :
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7
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The average of 6 observations is 45.5. If one new observation is added to the previous observations, then the new average becomes 47. The new observation is :
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8
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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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9
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The average of runs of a cricket player of 10 innings was 32. How many runes must be made in his next innings so as to increase his average of runs by 4?
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10
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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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