New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    In a college the ratio of boys and girls are in the

    ratio 3:4. 40% girls and 20% boys were absent. Find the girls present if the total number of students in a college were 210.
    A 84 Correct Answer Incorrect Answer
    B 72 Correct Answer Incorrect Answer
    C 90 Correct Answer Incorrect Answer
    D 56 Correct Answer Incorrect Answer

    Solution

    Boy : Girl = 3:4 Total number of students = 210 Number of Boys = (3/7) × 210 = 90 Number of Girls = (4/7) × 210 = 120 Number of girls absent = 40% × 120 = 48 Number of boys absent = 20% × 90 = 18 Total number of girls present = 120 – 48 = 72

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