Prb(woman) = .2
prb(man) = .8
1)choosing 10 ...
prob(exactly 2 women) = C(10,2)(.2)^2(.8)^8
= .302
etc.
Also look at the reply to the next post, I think it is your post.
Find the indicated binomial probabilities. Round to the nearest 3 decimal places.
In a local college, 20% of the math majors are women. Ten math majors are chosen at random.
1) What is the probability that exactly 2 are women?
2) What is the probability that 2 or less women are selected?
3) What is the probability that no women are selected?
4) Find the mean u
5) Find the variance o2
1 answer
1 answer