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A school has only four classes that contain 10, 20, 30 and 40 students respectively. The pass percentage of these classes are 20%, 30%, 60% and 100% respectively. Find the pass % of the entire school.

A. 56%

B. 76%

C. 34%

D. 66%

E. None of these

Answer: Option D

Solution(By Examveda Team)

The number of pass candidates are 2 + 6 + 18 + 40 = 66 out of total 100.
Hence, Pass percentage = 66%

This Question Belongs to Arithmetic Ability >> Average

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Comments ( 3 )

  1. Abduselam Isak
    Abduselam Isak :
    4 months ago

    To find the pass percentage of the entire school, we need to calculate the weighted average of the pass percentages of each class. The weight of each class is determined by the number of students in that class.

    Let's calculate:

    Pass percentage of Class 1 (10 students, 20% pass rate): 10 students * 20% = 2 students pass

    Pass percentage of Class 2 (20 students, 30% pass rate): 20 students * 30% = 6 students pass

    Pass percentage of Class 3 (30 students, 60% pass rate): 30 students * 60% = 18 students pass

    Pass percentage of Class 4 (40 students, 100% pass rate): 40 students * 100% = 40 students pass

    Total number of students: 10 + 20 + 30 + 40 = 100 students

    Total number of students who passed: 2 + 6 + 18 + 40 = 66 students

    Pass percentage of the entire school: (66 students / 100 students) * 100% = 66%

    Therefore, the pass percentage of the entire school is 66%.

    The correct answer is D. 66%.

  2. Shah Wakeel
    Shah Wakeel :
    5 years ago

    10x20%=2
    20×30%=6
    30×60%=18
    40×100%=40
    2+6+18+40=66

  3. Gary Pandat
    Gary Pandat :
    6 years ago

    2+6+18+40 = 66 ????
    How it is possible????

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