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The average weight of 14 students was calculated as 71. But it was later found that the weight of one student had been wrongly entered as 42 instead of 56 and of another as 74 instead of 32. - Mathematics

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MCQ

The average weight of 14 students was calculated as 71. But it was later found that the weight of one student had been wrongly entered as 42 instead of 56 and of another as 74 instead of 32. The correct average is

Options

  • 75

  • 80

  • 68

  • 69

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Solution

69

Explanation:

Required average`=(14xx71+56-42+32-74)/14`

`=966/14=69`

Concept: Average and Age
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