Question

In a class 50% of students passed in mathematics, 70% of students passed in Science, 10% of students failed in both the subjects and 300 atleast passed in one subject. Find how many students in a class?

Answer 1

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let total number of students be'x'
= 100%
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the students passed in mathematics
= 50%

the students passed in science
= 70 %

the students failed in both subjects
= 10 %
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total passed students :
_______________________________

= 100 - 10 = 90 %

students Passed at least in 1 subject :
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= (50 + 70 ) - 90 = 120 - 90 = 30 %

according to question ,
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30 % of x = 300

0.3 x = 300 => x = 1000

therefore ,

total number students in class = 1000

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Your Answer : 1000 students
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