Question

1)
Ina competitive exam 50 students passed in English. 60 students passed in Mathematics.
40 students passed in both the subjects. None of them fail in both the subjects. Find the
number of students who passed at least in one of the subjects ?



please give me answer fast.
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Answer 1

Answer:

70

Step-by-step explanation:

Number of students passed in English = 50

ie P(A) = 50

Number of students passed in Mathematics = 60

ie. P(B) = 60

Number of students passed in both the English and Mathematics = 40

ie. P(A n B) = 40

Therefore number of students passed atleast in one of the subjects = 50 + 60 - 40 = 70

ie. P(A) + P(B) - P(A n B) = P(A u B)

=>> 50 + 60 - 40 = 70