Trial of an experiment

What is the sum of all the probabilities of trials of an experiment?

A man performs 10 trials of an experiment, if the probability of getting '4 sucesses' is maximum, then find the probability of failure in each trial.

A man performs 10 trials of an experiment, if the probability of getting '4 sucesses' is maximum, then find the probability of failure in each trial.

A man performs 10 trials of an experiment, if the probability of getting '4 sucesses' is maximum, then find the probability of failure in each trial.

A man performs 10 trials of an experiment, if the probability of getting '4 sucesses' is maximum, then find the probability of failure in each trial.

If in 6 trials of an experiment the probability of a successes is 5 times the probability of a failure, then find the probability of two successes.

For 6 trials of an experiment, let X be a binomial variate which satisfies the relation 9P(X = 4) = P(X = 2) . Find the probability of success.

For 6 trials of an experiment,let X be a binomial variate which satisfies the relation 9P(X=4)=P(X=2). Find the probability of success.

For 6 trials of an experiment. Let X be a binomial variate which satisfies the relation 9P(X=4)=P(X=2) Find the probability of success.

Mean and variance of a Binomial variate are in the ratio of 3:2. The most probable number of happening of the variable in 10 trials of the experiment is?