Finding the probability getting head/tail in a throw of a fair coin

Find the probability of getting a head in a throw of a coin .

The probability of getting exactly 2 tails in 6 tosses of a fair coin is

Find the probability to get three heads in the three throws of a coin?

Three unbiased coins are tossed. Find the probability of getting one head and two tails,

Find the probability of getting one head and one tail in one toss of two coins.

two fair coins are tossed simultaneously . Find the probability of getting atleast two heads :

A biased coin in which probability of getting head is twice to that of tail. If coin is tossed 3 times then the probability of getting two tails and one head is

Finding the probability of getting at most one head (tail) / exactly two head(tail) if two coins are tossed