Q .     For any two events `A` and `B`, if ` P ( A\cup B ) =\ frac {5}{6},\quad P ( A\cap B ) = frac {1}{3},\quad P ( B ) = frac {1}{2}`, then ` P ( A )` is:

BITSAT 2011
A

`\ frac {1}{2}`

B

`\ frac {2}{3}`

C

`\ frac {1}{3}`

D

none of these

HINT

use `quad P ( A\cup B ) =P ( A ) +P ( B ) -P ( A\cap B )`

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