Question

The mean of 5 numbers is 18. If one number is excluded, their mean becomes 16. Then, the excluded number is

• A. 18
• B. 25
• C. 26
• D. 27

Answer 1

The correct option is C 26

Sum of all the numbers $=18\times 5=90$

After one number is excluded, sum of the remaining numbers is $16\times 4=64$

Then, the excluded number is $90-64=26$