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Q:

In two successive year 100 and 75 students of school appeared at the final examination. Respectively 75% and 60 % of them passed. The average rate of pass is:

  • 1
    $$80{1\over2}\%$$
  • 2
    80%
  • 3
    $$68{4\over7}\%$$
  • 4
    78%
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Answer : 3. "$$68{4\over7}\%$$"

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