A coin is tossed 2n times. The probability of getting head n times, is -

A coin is tossed n times. The probability of getting head at least once is more than 0.8 , then the value of n is

A coin is tossed n times. The probability of getting head atleast once is greater than 0.8. Then the least value of such n is

A coin is tossed n times. The probability of getting head atleast once is greater than 0.8. Then the least value of such n is

A coin is tossed 8 times . The probability of getting a head three times is :

A coin is tossed 3 times. The probability of getting exactly 2 heads is ________.

A coin is tossed three times. The probability of getting head and tail alternately, is