A family has 4 children. The probability of having a boy is 50% (girl is the same 50%).
1) What is the probability that the family only has one boy?
2) What is the probability that the family only has three boys?
3) What is the probability that the family has at least one boy?
4) What is the probability that 4 children are girls?

Suppose that the probability that a person will develop hypertension over a lifetime is 20%.
5) What is the probability that 4 or 5 people develop hypertension over a lifetime among 20 students graduating from the same high school class?
6) What is the probability that exactly 3 people develop hypertension over a lifetime among 20 students graduating from the same high school class?
7) What is the probability that at least 2 people develop hypertension over a lifetime among 20 students graduating from the same high school class?

Three questions on probability. ... For a patient selected at random: a) What is the probability that the drug will be effective for 2 hours or less? ...

Expectation. 1) A coin having probability p of coming up heads is continually flipped until both heads and tails have appeared. ... Then required probability is. ...

Probability of Error. ... Estimate the standard deviation for the meter. What is the probability of an error of 0.75 V? Please see the attached file. ...

... person has the gene when they don't) rate of 6%, and a false negative rate of 3%. What is the probability that a ... Apply Bayes theorem to get the probabilities. ...

... Pairs of distinct vertices an edge is, independently, present with probability p. The degree of vertex i, designated as Di, is the number of edges that have ...