You are Here: Home >< Maths

# Probability help plsssss Watch

1. Have completely forgotten how to do these questions, can someone walk me through them pls

Spoiler:
Show
A new drug treatment is found to increase the survival rate from a certain disease from 50% for those not given the treatment to 75% for those given the treatment. Of a group of 100 patients suffering from the disease, 10 were chosen at random to undergo the treatment.(i) What is the probability that a randomly chosen patient from the group of 100 was given the treatment and survived?(ii) What is the probability that a patient who survived was given the treatment?(iii) What is the probability that a patient who did not survive was given the treatment?
2. (Original post by somemightsay888)
Have completely forgotten how to do these questions, can someone walk me through them pls
Spoiler:
Show
A new drug treatment is found to increase the survival rate from a certain disease from 50% for those not given the treatment to 75% for those given the treatment. Of a group of 100 patients suffering from the disease, 10 were chosen at random to undergo the treatment.(i) What is the probability that a randomly chosen patient from the group of 100 was given the treatment and survived?(ii) What is the probability that a patient who survived was given the treatment?(iii) What is the probability that a patient who did not survive was given the treatment?
3. chance that they're given the treatment (10/100) x 75% of survival

OR (+)

the chance that they're not given the treatment which is 90/100 x 50% chance of survival

I think this is what you do?? someone pls correct me

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: October 19, 2016
Today on TSR

### Should I hide my grades on UCAS?

I don't want Oxford to know I only got an A...

### He wants to drop out of Cambridge?

Discussions on TSR

• Latest
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