Math, asked by snehalchavan4872, 1 year ago

The average of 10 number is 20 if the average of first nine number is 21 what is the value of the last number

Answers

Answered by Avinashj2002

1

Average of 10 no.=20
Sum of 10 no.=20×10
=200
Average of first 9 no.=21
Sum of first 9 no.=9×21
=189
Therefore,10th no.=200-189
=11

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