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      Question

      A batch of 480 students consists of 50% male students.

      Among them, 60% of boys and 70% of girls like science. Calculate the number of students who do not like science.
      A 142 Correct Answer Incorrect Answer
      B 168 Correct Answer Incorrect Answer
      C 125 Correct Answer Incorrect Answer
      D 145 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ,

      Total number of boys = 480 ร— 0.5 = 240

      Total number of girls = 480 - 240 = 240

      Number of boys who do not like science = 240 ร— 0.4 = 96

      Number of girls who do not like science = 240 ร— 0.3 = 72

      Total number of students who do not like science = 96 + 72 = 168

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