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Blizzard [7]
2 years ago
5

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

Mathematics
2 answers:
yKpoI14uk [10]2 years ago
6 0

Answer:

a. 8/20 - 2/5

b. 2/8

Step-by-step explanation:

drek231 [11]2 years ago
4 0

Answer:

Step-by-step 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:

\frac{8}{20}.  But always reduce if you can, so the actual ratio of girls to total students is

\frac{8}{20}=\frac{4}{10}=\frac{2}{5}.  So

a. \frac{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

\frac{2}{8}. But again, reduce if you can, so

b. \frac{1}{4}

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