Question

The mean of 10 numbers is 20.If 5 is subtracted from every number,then,what will be the new mean?

Answer 1

the new mean wil be -40

Answer 2

mean=sum of the no./total no.
20=sum of no./10
sum of no.=20×10=200
now 5 is subtracted from each no.
so .new sum=200-50=150
new mean =150/10=15
therefore. .....new mean=15


.....Hope it help you!