Question

The average of ten numbers is 7. If each number is multiplied by 12, then the average
of the new set of numbers is :
(a) 7
(b) 19
(e) 82
(d) 84​

Answer 1

Answer:

84

Step-by-step explanation:

average linearly depends on numbers if they are multiplied by some number average will also get multiplied

Answer 2

Answer: 84

Step-by-step explanation:

Average= sum of observation / no of observations

7 =sum of observation/10

sum of observation=7*10=70

If all observations are multiplied by 12,

70*12=840

Hence new sum of observation is 840

New average = sum of observation /no of observations

=840/10=84

I hope this will help you..