x Turn on thread page Beta
 You are Here: Home >< Maths

# S2 edexcel question watch

1. For part B, why can't I use my method?here it is:

The mark scheme used a different method but I don't see why I can't use mine?

Posted from TSR Mobile
2. (Original post by Lilly1234567890)

For part B, why can't I use my method?here it is:

The mark scheme used a different method but I don't see why I can't use mine?

Posted from TSR Mobile
P(x=2) = P(x=0) + P(X=1)+P(x=2) isn't correct, that is for a slightly different scenario
3. P(x=2)=10C2*0.03^2*0.97^8
4. (Original post by samb1234)
P(x=2) = P(x=0) + P(X=1)+P(x=2) isn't correct, that is for a slightly different scenario
In what type of scenario can I use this method?

Posted from TSR Mobile
5. (Original post by constellarknight)
P(x=2)=10C2*0.03^2*0.97^8
Why I can't I use a binomial?

Posted from TSR Mobile
6. (Original post by Lilly1234567890)
Why I can't I use a binomial?

Posted from TSR Mobile
(Original post by Lilly1234567890)
In what type of scenario can I use this method?

Posted from TSR Mobile
That is a binomial distribution.

7. (Original post by Lilly1234567890)
In what type of scenario can I use this method?

Posted from TSR Mobile
p(x<= 2)

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: February 28, 2016
Today on TSR

### University rankings 2019

Cambridge at number one

Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams