Probability

Why multiply by 1 * 1/5

Why not 1/5 *1/5 because there is a 1/5 probability of finding a fridge magnet

How do i knwo when to use 1 and an actual probability in questions for the exam!?

Q 4i and A:
http://mei.org.uk/files/papers/s110ju_wtfd.pdf

Reply 1

DFranklin

Original post by esmeralda123

Why multiply by 1 * 1/5

Why not 1/5 *1/5 because there is a 1/5 probability of finding a fridge magnet The probability of finding a fridge magnet in a packet is 1. ("Each packet contains one fridge magnet").

How do i knwo when to use 1 and an actual probability in questions for the exam!?

There's no "easy" answer. In general you need to read the question and find a mathematical way of describing what's going on that allows you to find the probability.

It's basically practice and doing lots of examples.

Reply 2

debbie394

Original post by DFranklin

The probability of finding a fridge magnet in a packet is 1. ("Each packet contains one fridge magnet" :wink:

.

There's no "easy" answer. In general you need to read the question and find a mathematical way of describing what's going on that allows you to find the probability.

It's basically practice and doing lots of examples.