If P(A) = 6
11 , P(B) = 5
11 and P(A ∪ B) 
 117
, find
(i) P(A∩B)
(ii) P(A|B)
(iii) P(B|A)
Determine P(E|F) in Exercises 6 to 9 6 A coin is tossed three times, where
(i) E : head on third toss  ,      F : heads on first two tosses
(ii) E : at least two heads  ,     F : at most two heads
(iii) E : at most two tails    ,      F : at least one tail
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not to be republished
PROBABILITY      539
7 Two coins are tossed once, where
(i)
E : tail appears on one coin,
F : one coin shows head
(ii)
E :  no tail appears,
F : no head appears
8