1.

radhe and vishnu appear in an interview for two vacancies in the same post. the probability of radhe's selection is (2/7) and the probability of vishnu's selection is(2/5) . what is the probability that only one of them selected.​

Answer»

ANSWER:

LET A be the event of HUSBAND getting selected.

P(A) = 1/4

P( not A) = 3/4

Let B be the event of wife getting selected.

P(B) = 1/3

P( not B) = 2/3

Now let E be the event of one of them getting selected

THEREFORE,

P(E) = P(A) P( not B) + P(B) P( not A)

= 1/4 x 2/3 + 1/3 x 3/4

= 5/12



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