Mathematics : Probability

A coin is tossed three times, where
E : at least two heads , F : at most two heads

A coin is tossed three times, where
E : at most two tails , F : at least one tail

Two coins are tossed once, where
E : tail appears on one coin,                  F : one coin shows head
Determine P(E | F).

Two coins are tossed once, where
E : no tail appears, F : no head appears
Determine P(E | F).