What number must be added to the sey 9,17,21 and 13 to get an average of 15?
Answers
Answered by
0
let the number be x
therefore,
average=sum of all no.s/total no.s
therefore,
15=9+17+21+13+x/5
75=60+x
75-60=x
15=x
therefore,
x=15
therefore,
average=sum of all no.s/total no.s
therefore,
15=9+17+21+13+x/5
75=60+x
75-60=x
15=x
therefore,
x=15
Similar questions