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If n(A)=2, P(A)=1/5, Then n(S)=? a)10 b)...

If `n(A)=2`, `P(A)=1/5`, Then `n(S)=?` a)`10` b)`5/2` c)`2/5` d)`1/3`

A

10

B

`5/2`

C

`2/5`

D

`1/3`

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