Q321
Open questionThe average of six numbers is 32. If each of first three numbers is increased by 2 and each of the remaining three numbers is decreased by 4, then the new average is ?
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Q322
Open questionThe average of all the odd integers between 2 an 22 is ?
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Q323
Open questionThe average weight of five persons sitting in a boat is 38 kg. The average weight of the boat and the persons sitting in the boat is 52 kg. What is the weight of the boat ?
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Q324
Open questionThe average expenditure of a man for the first five months Rs. 1200 and for the next seven months is Rs. 1300. If he saves Rs. 2900 in that years, his monthly average income is -
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Q325
Open questionThe average age of mother and her six children is 12 years, which is reduced by 5 years if the age of mother is excluded. The age of the mother (in years) is :
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Q326
Open questionThere are 50 students in a class. Their average weight is 45 kg. When one student leaves the class the average weight reduces by 100 g. What is the weight of the student who left the class ?
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Q327
Open questionThe mean of 20 items is 55. If two items 45 and 30 are removed, the new mean of the remaining items is :
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Q328
Open questionThe average weight of a group of 20 boys was calculated to be 89.4 kg and it was later discovered that one weight was misread as 78 kg instead of 87 kg. The correct average weight is -
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Q329
Open questionA batsman in his 12th innings makes a score of 63 runs and there by increases his average score by 2. What is his average after the 12th innings ?
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Q330
Open questionOut of 10 teachers of a school, one teacher retires and in place of him a new teacher 25 years old joins. As a result of it average age of the teachers reduces by 3 years. Age of the retired teacher (in years) is -
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Q331
Open questionThe average of the first 100 positive integers is -
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Q332
Open questionThe average age of 11 players of a cricket team decreases by 2 months when two new players are included in the team replacing two players of age 17 years and 20 years. The average age of new players is :
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Q333
Open questionThe mean of 50 numbers is 30. Later it was discovered that two entries were wrongly entered as 82 and 13 instead of 28 and 31. Find the correct mean.
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Q334
Open questionAverage of n numbers is a. The first number is increased by 2, second one is increased by 4, the third one is increased by 8 and so on. The average of the new numbers is -
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Q335
Open questionThe average age of 30 boys in a class in 15 years. One boy, aged 20 years, left the class, but two new boys came in his place whose age differs by 5 years. If the average age of all the boys now in the class becomes 15 years, the age of the younger newcomer is :
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Q336
Open questionThe average of 8 numbers is 20. The average of first two numbers is and that of the next three is . If the sixth number be less than the seventh and eighth numbers by 4 and 7 respectively, them the eighth number is :
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Q337
Open questionThe average age of a class of 39 students is 15 years. If the age of the teacher is included, then the average increases by 3 months. Find the age of the teacher.
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Q338
Open questionThe mean of 9 observation is 16. One more observation is included and the new mean becomes 17. The 10th observation is :
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Q339
Open questionThe average weight of first 11 persons among 12 persons is 95 kg. The weight of 12th person is 33 kg more than the average weight of all the 12 persons. The weight of the 12th person is :
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Q340
Open questionIn the afternoon, a student read 100 pages at the rate of 60 pages per hour. In the evening, when she was tired, she read 100 more pages at the rate of 40 pages per hour. What was her average rate of reading the pages per hours ?
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