The average of 10 nos is 7.If each number is multiplied by 12,then the average of the new set of numbers is
Answers
Answered by
0
Average of 10 numbers = Sum of 10 numbers/10
But average given is 7
∴ Sum of 10 numbers/10 = 7
sum of 10 numbers = 70
Now each number is multiplied by 12 and their are 10 numbers
∴New Sum = 12 × ( sum of all numbers)**
= 12 ( 70)
= 840
New average = 840/10
= 84
**New Sum = 12×first number + 12× second number.... + 12× 10th number
= 12( first number + second number +.... + tenth number)
= 12 × old number
Similar questions