ЁЯУв Too many exams? DonтАЩt know which one suits you best? Book Your Free Expert ЁЯСЙ call Now!

  • google app store apple app store
  • тЬЦ

      Question

      The average marks of 12 students in an exam is (x + 10).

      If the average of the first six students is 50 and that of the remaining six is 70, find the value of (x + 30).
      A 25 Correct Answer Incorrect Answer
      B 45 Correct Answer Incorrect Answer
      C 30 Correct Answer Incorrect Answer
      D 80 Correct Answer Incorrect Answer

      Solution

      According to the question, The average marks of 12 students = (x + 10) = 12 * (x + 10) The total marks of first six students = 6 * 50 = 300 The total marks of last six students = 6 * 70 = 420 300 + 420 = 12 * (x + 10) 720 = 12(x + 10) 60 = x + 10 x = 50 x + 30 = 80

      Practice Next
      More Average Questions
      ask-question