Homework HELP

#1
Did I do this right?:confused:

The percentage of American men who say they would marry the same woman if they had to do it all over again is 80%. The percentage os American women who say they would marry the same man again is 50%.

a) What is the probability that in a group of 10 married men, at least 7 will claim that they would marry the same woman again? What is the probability that less than half will say this?

P(x > or equal to 7) = (10 nCr 7)(.8)^7(.2)^3 = .201

P(x < 5) = (10 nCr 7) (.8)^5 (.2)^5 = .0125

HELP!!

Thank You
 
#2
Hi,

If atleast means you will have to calculate

1) P(x > or equal to 7) = p(x=7)+p(x=8)+p(x=9)+p(x=10)

2) similarly
P(x<5) = p(x=0)+P(x=1)+p(x=2)+p(x=3)+p(x=4)

regards,
Re.Vinaitheerthan