Question

the mean of 10 numbers is 20 if 5 is being multiplied to every number what will be the new mean​

Answer 1

initially,

mean= 20

no of numbers= 10

then,sum of these 10 number=10×20=200

if each no is multiplied by 5 ,then their sum is 5 times the previous sum

new sum= 5×200=1000

new mean= 1000/10= 100