Latest MBA Aptitude Question SOLUTION: In an examination ,80% student passed in physics ,70% in chemistry while 15% failed in both the subject.if 325 students passed in both the subjects.Find the total no. of student wh

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(#M40015667) MBA Numerical Ability question averages, percentages, profit loss and interest Keep an EYE

In an examination ,80% student passed in physics ,70% in chemistry while 15% failed in both the subject.if 325 students passed in both the subjects.Find the total no. of student who appeared in the examination.

1) 500
2) 400
3) 300
4) 600

Asked In MBA (11 years ago)

Unsolved Read Solution (4)

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MohanRaj  (11 years ago)

answer 500

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Ankit Sinha  (6 years ago)

Answer. 1) 500
Explanation.
T - total number of students.
80% student passed in physics ,70% in chemistry
20% failed in physics , 30% failed chemistry and 15% failed both
No. of student who failed at least in one subject = 0.20T + 0.30T - 0.15T = 0.35T
That is 0.35T or 35% of students failed at least on subject or we can say 65%(T-0.35) of students passed in both the subjects(Since T = failed in both + atleast one + failed in none(Passed both)).

So 0.65T = 325
T = 500

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neha  (6 years ago)

1) 80% students passed in physics. 20% students failed in physics
2) 70% students passed in chemistry. 30% students failed in chemistry.
3) 15% students failed in both exams

20 + 30 - 15 = 35% students failed in both exams.
Hence , 65% students passed in both exams

65% of x = 325
X = 500

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Chethan s  (8 years ago)

80% of students passed in physics+70% of students passed in chemistry +325 students who passed in both+15% who failed in both= total no of students

Let x be total no of students then solution is,

0.8x+0.7x+325+0.15x=x

Solving the above equation gives 500.

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