How many times must a man toss a fair coin so that the probability of having at least one head is more than 90%?

How many times must a man toss a fair coin so that the probability of having atleast one head is more than 90%?

Ten coins are tossed. The probability of getting at least 8 heads is

The probability of a shooter hitting a target (3)/(4) How many minimum number of times must he/she fire so that the probability of hitting the target atleast once is more than 0.99?

It a fair coin is tossed 6 times, what is the probability of getting at least 3 heads?

A coin is tossed twice. What is the probability of getting exactly one head ?

Find the probability of getting at least one tail in 4 tosses of a coin.

The minimum number of times a fair coin needs to be tossed, so that the probability of getting at least two heads is at least 0.96 is :