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
© NCERT
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 A die is thrown three times,
E : 4 appears on the third toss,
F : 6 and 5 appears respectively
on first two tosses
9