30. The average of seven numbersis 18. If one of the number is 17and i – InterviewSolution

1.	30. The average of seven numbersis 18. If one of the number is 17and if it is replaced by 31, thenthe average becomes :
Answer» the average of seven numbers =18Sum=18×7=126new sum=126+(31-17)=140then average =140÷7=20 Ans

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