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Question

If E1 and E2 are two events such that P(E1)=14,P(E2E1)=12 and P(E1E2)=14, then which of the following is/are correct?

A
E1 and E2 are mutually independent events
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B
E1 and E2 are exhaustive events
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C
E2 is twice as likely to occur as E1
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D
P(E1E2),P(E1),P(E2) are in G.P
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Solution

The correct options are
A E1 and E2 are mutually independent events
C E2 is twice as likely to occur as E1
D P(E1E2),P(E1),P(E2) are in G.P
P(E2E1)=P(E1E2)P(E1)P(E1E2)=18P(E2)=18P(E1E2)=12P(E1)P(E2)=14×12=P(E1E2) & P(E1E2)=58
So E1 & E2 are independent but not exhaustive set of events

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