The average of eight numbers is 22 seven of them are 15,16,20,19,24,30 and 17. what is the eight number ?
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average of 8 numbers =22
numbers of the data are=15,16,20,19,24,30,17
eight number??
soln)) average =sum of the data /no of data
let the 8th number be x;
22=(15+16+20+19+24+30+17+x)/8
22=141+x/8
22*8=141+x
176-141=x
x=35ans
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