If a coin is flipped twice , what is the probability of the event I head and I tail ?

A coin is tossed twice, what is the probability that: one head and one tail occurs?

When a coin is flipped once, what is the probability of getting HEAD ?

A coin is tossed twice, what is the probability that: no head occurs?

A coin is tossed twice, what is the probability that etleast on tail occurs?

If a coin is flipped and one die is thrown, what is the probability of getting a head or a 4?

If a coin is flipped and one die is thrown, what is the probability of getting a head or a 4?

A coin is biased so that a head is twice as likely to occur as a tail. If the coin is tossed 3 times, what is the probability of getting 2 tails and 1 head?

A coin is tossed 300 times and we get head: 136 times and tail: 164 times. When a coin is tossed at random, what is the probability of getting Q (i) a head (ii) a tail