Practice30Create account

The mean of 5 numbers is 27. When one of the numbers is removed, the mean of the remaining numbers becomes 25. Find the number that was removed.

Competition practiceData & Probability
  • A35
  • B30
  • C32
  • D37

Step-by-Step Solution

Total of all five = . Total of the remaining four = . The removed number is 135 − 100 = 35.
Answer: A) 35

Master this topic in 30 minutes a day.

Don't just memorise the answer — build a daily practice habit.

Practice 5 Similar Questions Free →

All Data & Probability practice questions

More Data & Probability practice

A bag contains 4 white and 5 black balls. Two balls are drawn one after the other…The standard deviation of five numbers is 4. Each of the numbers is multiplied by 3.…A player scores a goal in a match with probability 1/4, independently of every other…Number of students in three classes — Class 8: Boys 24, Girls 18. Class 9: Boys 20,…What is the mean of the first 20 odd natural numbers?