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Question: A coin is tossed three times is succession. If E is the event that there are at least two heads and ...

A coin is tossed three times is succession. If E is the event that there are at least two heads and F is the event in which first throw is a head, then P(E/F) =

A

¾

B

3/8

C

½

D

1/8

Answer

¾

Explanation

Solution

F Ī {(HTT) (HHT) (HTH) (HHH)}

P (EF)\left( \frac { E } { F } \right) =24\frac { 2 } { 4 }= 12\frac { 1 } { 2 }