Solution: What is the arithmetic mean of the remaining numbers?

The arithmetic mean of 80 numbers is 55. If two numbers namely 250 and 850 are removed, what is the arithmetic mean of the remaining numbers?

What is the arithmetic mean of the remaining numbers?

Problem Statement: ECE Board April 1998

The arithmetic mean of 80 numbers is 55. If two numbers namely 250 and 850 are removed, what is the arithmetic mean of the remaining numbers?
  • A. 42.31
  • B. 50
  • C. 38.62
  • D. 57.12

Problem Answer:

The arithmetic mean of the remaining numbers is equal to 42.31.

Solution:

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