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

An unbiased coin is tossed n times. If the probability of getting atleast one head is greater than 0.8, then the least value of n is

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

A coin is tossed n times . If the probability of getting at least one head is greater than 0.9 then the minimum vaue of n is

A coin is rolled n xx.If the probability of getting head at least once is greater than 90% then the minimum value of n is