What is the Third Number?

The average of five positive number is 213. The average of the first two Number is 233.5 and the average of the last two number is 271.
What is the third number?

  1. 64
  2. 56
  3. 106
  4. Cannot be determined
Monis Rasool Professor Asked on 2nd June 2015 in Maths.
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  • 1 Answer(s)

    Answer: (40) cannot be determined
    Explanation:-
    The average of five positive numbers = 213
    Therefore, the sum of five positive numbers = 213 x 5 = 1065

    The average of first two positive numbers = 233.5
    Therefore, the sum of first two positive numbers = 233.5 x 2 = 467

    The average of last two numbers = 271
    Therefore, the sum of last two numbers = 271 x 2 = 542

    Third number = 1065 – (476 + 542)
    = 1065 – 1018
    = 47

    Hence, the third number is 47.

    Anurag Mishra Professor Answered on 2nd June 2015.
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