The average of 7 numbers is 8. If one number is added, their average is 9. Then the added number is
The average of 7 numbers = 8
=> Sum of 7 numbers = 7*8 = 56
Let added number be $$x$$
=> $$\frac{56 + x}{8} = 9$$
=> $$x = 72 - 56 = 16$$
Create a FREE account and get:
Quick, Easy and Effective Revision
By proceeding you agree to create your account
Free CAT Formulae PDF will be sent to your email address soon !!!
