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Q.

Let E and F be two independent events .  The probability that exactly one of them occurs is 1125  and probability of none of them occurring is 225 .  If PT  denotes the probability of occurrences of event T.  Then 

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a

PE=15,PF=25

b

PE=45,  PF=35

c

  PE=25,  PF=15

d

PE=35,PF=45

answer is A, D.

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Detailed Solution

Solve the equations PEFPEF=1125

PE¯F¯=225

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