The mean weight of a class of 35 student...

The mean weight of a class of 35 student is 45 kg. if the weight of the teacher be included, the mean weight increases by 500g. Find the weight of the teacher.

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The correct Answer is:

64 kg

Total weight of 34 students = `( 46.5 xx 34) kg = 1581 kg `
Total weight of ( 34 students +1 teacher ) = ` ( 47 xx 35) ` kg = 1645 kg

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RS AGGARWAL-MEAN , MEDIAN AND MODE OF UNGROUPED DATA -Exercise 18A

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