Question

In an examination 40% of total students

failed in English, 50% of student failed in

Hindi and 30% in both. Find the percentage

of students who passed in both the subjects.​

Answer 1

Answer:

Step-by-step explanation:

The number of student who pass in both Subjects are 40%.

Step by step explanation :

Hey Mate,

X is the number of students who fail in Hindi  Subject

Y is the number of students who fail in English Subject.

Given Data :

n ( X ) = 35

n ( Y ) = 45

n ( X ∩ Y )=20

Now,

n( X ∪ B ) = n ( X ) + n ( Y ) - n( X ∩ Y )

n( X ∪ B ) = ( 35 + 45 ) - 20

n( X ∪ B ) = 80 - 20

n( X ∪ B ) = 60

So, The number of student who pass in both Subjects are :

=> 100 - n( X ∪ B )

=> 100 - 60

=> 40%

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