Question 70
The average of 8 numbers is 44. If a constant ‘Y’ is added to each number,then average becomes 47. What is the value of ‘Y’?
Solution
Given that the average of 8 numbers = 44
Let the total sum of 8 numbers be A
Then, A = 44*8 = 352
Given, Y is added to all the numbers.
Then, A+8Y = 47*8 = 376
Substituting A = 352 in above equation.
8Y = 376-352 = 24
=> Y = 24/8 = 3
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