If the probability of success in a single trials is 0.05, how many Bernoulli trials must be performed in, order that the probability of at least one success is `2/3` or more.

If the probability of success in a single trial is 0.05 , how many Bernoulli trials must be performed in, order that the probabiliy of at least one success is (2)/(3) or more.

If the probability of success in a single trial is 0.01 , how many Bernoulli trials must be performed in, order that the probabiliy of at least one success is (1)/(2) or more?

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

Suppose a machine produces metal parts that contain some defective parts with probability. How many parts should be produced in order that the probability of at least one part defective is 1/2 or more? ("Given log"_(10) 95 = 1.977 "and" "log"_(10) 2 = 0.3)

The probability of success in a single trial of a random experiment is constant and the trial is repeated inependently seven timed, if the probability of 4 successes is equal to 3 successes, find the probability of 3 successes in 5 independent trials of the experiment.

The probability of a man hitting a target is (1)/(4) . How many times must he fire so that the probability of his hitting the target at least once is greater than (2)/(3) ?

If the mean and variance of a certain binomal distribution are 4 and 3.2 respectively, find the probability of at least one success.

In on examination the probability of a student passed in physics is 2/3 , passed in both English,and physics is 14/45, If the probability of passing at least one subject is4/5 , find the probability of passing in English?

If p be occurrence of an event in a single trail, then show that the probability of at least one occurrence in n trials is 1-(1-p)^n .