Question

B
2000 camidates appear in a written test.
in Mathematics and General Awalness so
a government job.1800 passed in at
in mathematus &
one subject. Of 1200 passed
1500 in General Awarness, and
how many passed in both the subjects?

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Answer 1

passed in both=1800 n(AuB)

passed in math=1200n(A)

passed in general awareness =1500 n(B)

Passed in both=n(AnB)=n(A)+n(B)-n(AuB)=1200+1500-1800=900