A person who tosses an unbiased coin gains two points for turning up a head and loses one point for a tail. If three coins are tossed and the total score X is observed, then the range of X is

An unbiased coin is tossed to get 2 points for turning up a head and one point for the tail.If three unbiased coins are tossed simultaneously,then the prob.of getting a total of odd no.of points is

An unbaiseed coin is tossed to get 2 points for tunring up a head and one point for the tail. If three unbaised coins are tossed simultaneously , then the probability of getting a total of odd number of points is

Three coins are tossed. Find the probability of : atleast one head and one tail.

Two coins are tossed. Find the probability of the event no head turns up.

If two coins are tossed, then find the probability of the event: No head turns up

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

Two unbiased coins are tossed. Find the probability of getting two heads

An unbiased coin is tossed eight times. The probability of obtaining at least one head and at least one tail is :