Binomial distribution in probability and total probability

Law of total probability

In Binomial distribution if n is very large and probability of success of p is very small such that np = m (constant) then...............distribution is applied

The binomial distribution has:

An unbiased coin is tossed 8 times . Find by using binomial distribution the probability of getting at least 3 heads

An unbaised coin is tossed 8 xx.Find,by using binomial distribution,the probability of getting at least 6 heads.

An unbiased coin is tossed 6 times .Find using binomial distribution , the probability of getting at least 5 heads .

For a binomial distribution,

In a binomial distribution the probability of getting a success is 1/4 and standard deviation is 3, then its mean is

Which of the following distributions of probability of random variable X are the probability distributions? X:012P(X):0.60.40.2