The average of 9 number is 90 and average of first 5 is 50. Find the average of last 4 numbers
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Step-by-step explanation:
average(9)=90
sum of nine nos=90x9=810
sum of first five terms = 50x5=250
sum of last four terms = 810-250=560
average(last 4)=560/4=140
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