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      Question

      In a school of 50 students, the number of boys and girls

      is in the ratio of 4:1. The boys have an average score of 38, while the girls have an average score of 45. What is the overall average score of the entire class?
      A 57.5 Correct Answer Incorrect Answer
      B 63.20 Correct Answer Incorrect Answer
      C 55.50 Correct Answer Incorrect Answer
      D 39.4 Correct Answer Incorrect Answer

      Solution

      ATQ, Let the number of boys be 4x and girls be x, where 4x + x = 50 ⇒ x = 10. Then, boys = 40 and girls = 10. Total marks for boys = 40 × 38 = 1520. Total marks for girls = 10 × 45 = 450. Average marks for the class: Average = (1520 + 450)/50 = 39.4

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