# Proability

Announcements Posted on
Would YOU be put off a uni with a high crime rate? First 50 to have their say get a £5 Amazon voucher! 27-10-2016
1. 30% of toy adverts are directed at adults and 70% are directed at children. The chance an adult will buy the toy on seeing the advert is 5%, while the chance children will persuade their parents to get the toy bought for them when they see the advert is 1%.
What is the chance a toy will be purchased if someone in the family sees the advert?
What percentage of toy purchases are due to adverts directed at children?

Are the answers just 5% and 1%??
This is 4 marks in a uni exam
2. Forget 5% and 1% (way off)... You're looking for a probability...
https://www.mathsisfun.com/data/probability.html
3. (Original post by Deannnn97)
30% of toy adverts are directed at adults and 70% are directed at children. The chance an adult will buy the toy on seeing the advert is 5%, while the chance children will persuade their parents to get the toy bought for them when they see the advert is 1%.
What is the chance a toy will be purchased if someone in the family sees the advert?
What percentage of toy purchases are due to adverts directed at children?

Are the answers just 5% and 1%??
This is 4 marks in a uni exam
Does it say how many people are in the family? And does it say how many people actually watch the advert?

If it is one child and adult and they both watch the advert, the answer to a is 6%. If it is a two parent two child family the odds double to 12%, assuming they all watch the advert.
(.7/.01) /(.3/.05)= 46.666666666

There is some working out for the second part of the question. i don't think that this is the final answer though. You will really have to do your own working out for this one!

## Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
2. this can't be left blank
3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
1. Oops, you need to agree to our Ts&Cs to register

Updated: August 1, 2016
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:
Today on TSR

### University open days

Is it worth going? Find out here

Poll
Useful resources