Probability

[ReubenGidlow]

I have these probability questions.
How do you do (iii) and (iv)?
I understand the principals of binomial etc but confused once i got to this part of the question

 

[Steven G]

I think that you have the wrong idea about what this forum is all about. We help students with their math problems. We do not think that solving student's problems will help them at all. We actually expect the student to solve their own problems with help from us.

If you fail to show any work then we do not know what type of help you need. So please read our guidelines, follow them and then post back. Then you will receive excellent help.

Hint: Think binomial.