The mean of five numbers is 55. If one of the numbers is excluded, the mean gets reduced by 5. Which of the following is the excluded number?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2, i.e., 75.
Mean of 5 numbers = 55
Total of 5 numbers = 55 × 5 = 275
New mean after excluding a number = 55 - 5 = 50
Total of remaining 4 numbers = 50 × 4 = 200
Excluded number = 275 - 200 = 75