Suppose three coins are tossed. what is the probability that two will turn up heads, and one turn up tails?

T = Tail H = Heads

T T T

T T H

T H T

T H H

H T T

H T H

H H T

H H H

Above are all of the possibities the coins can land on which leads to a 3/8 chance that 2 coins will land on heads.