Three numbers chosen from 1 to 20. Probability that they are not consecutive is:

The median and mode of a frequency distribution are 26 and 29 respectively. Then the mean is:

If the probability that an individual suffers a bad reaction from an injection of a given serum is 0.001, then using Poisson's distribution, the probability that out of 2000 individuals, exactly 3 will suffer a bad reaction is:

When a random variable can take on any values within a given range where the probability distribution is continuous, it is called:

An experiment succeeds twice as often as it fails. The probability that in the next six trials, there will be at least 4 successes, is:

For a Poisson distribution model, if the arrival rate of passengers at an airport is recorded as 30 per hour, the probability of exactly 4 arrivals in the first 10 minutes of an hour is:

What is the number of words formed using the letters of the word COMPUTER, so that all the vowels are always together?

A speaks the truth in 70% cases and B speaks the truth in 84% cases. What is the probability that they contradict each other on a statement?

If two dice are thrown simultaneously, then what are total number of possible outcomes?

Event "P or Q" is represented by: