Question

this is pretty easy to most people its just that ive never studied this (open attachment) im in year 7

Answer 1

Explanation:

If a child is chosen at random, we are picking from all the children, of which there are a total of 20 (it says that at the top). You could also just add up all the numbers in the boxes to see that there are 20 students. There are a total of 8 girls. So the answer to a. What is the probability that the chosen child is a girl is the ratio of girls to total children:

`(8)/(20)`. But always reduce if you can, so the actual ratio of girls to total students is

`(8)/(20)=(4)/(10)=(2)/(5)`. So

a.
`(2)/(5)`

Now we want to know, out of girls only, what is the chance we will pick a left-handed girl. Out of the 8 girls total, only 2 of them are left-handed (not too many of us around!). Stating that as a ratio (which is another way to say "fraction"), we have

`(2)/(8)`. But again, reduce if you can, so

b.
`(1)/(4)`

Answer 2

a. 8/20 - 2/5

b. 2/8

Explanation: