📢 Too many exams? Don’t know which one suits you best? Book Your Free Expert 👉 call Now!
  • google app store apple app store
    • âś–

      Question

      There are three numbers 'a', 'b' and 'c' such that average

      of 'a' and 'b' is 19, average of 'b' and 'c' is 23 and average of 'a' and 'c' is 18. Find the average of 'a', 'b' and 'c'.
      A 18 Correct Answer Incorrect Answer
      B 19 Correct Answer Incorrect Answer
      C 20 Correct Answer Incorrect Answer
      D 21 Correct Answer Incorrect Answer
      E 22 Correct Answer Incorrect Answer

      Solution

      a + b = 2 Ă— 19
      Or, a + b = 38 -------- (I)
      b + c = 2 Ă— 23
      Or, b + c = 46 -------- (II)
      a + c = 2 Ă— 18
      Or, a + c = 36 -------- (III)
      On adding equations I, II and III,
      We get, a + b + b + c + a + c = 38 + 46 + 36
      Or, 2 Ă— (a + b + c) = 120
      Or, a + b + c = 60
      Therefore, required average = (60 / 3) = 20

      Practice Next
      More Average Questions
      ask-question