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3 years ago

Ratio and proportion practice

Mathematics

1 answer:

fenix001 [56]3 years ago

3 0

Let’s put this into a proportion.

4/40=x/50

Remember it says solve using unit rates so we can simplify 4/40 to 1/10

1/10=x/50

Now we can cross multiply.

10·x = 1·50

10x=50

X=5

Hope that helped!

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Step-by-step explanation:

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Binomial probability distribution

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And p is the probability of X happening.

Probability of at least 11 members being categorized as low risk participants.

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For each community, 8.50% probability of at least 11 members being categorized as low risk. So $p = 0.085$

Three comunities, so $n = 3$

This probability is P(X = 2).

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