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Misha Larkins [42]
3 years ago
5

The variables x and y are related proportionally. When x=12, y=8. Find x then y=12.

Mathematics
1 answer:
erastova [34]3 years ago
6 0
I don't know if this is correct..
warning: I may be wrong

so you have to do a proportion..

it's easy!

x1/y1 = x2/y2

so, plug in the values!

12/8 = x/12

now solve for x.

cross multiply:
8x = 144
divide by 8:
x = 18

there!

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Answer:

a) 0.06 = 6% probability that a person has both type O blood and the Rh- factor.

b) 0.94 = 94% probability that a person does NOT have both type O blood and the Rh- factor.

Step-by-step explanation:

I am going to solve this question treating these events as Venn probabilities.

I am going to say that:

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Event B: Person has Rh- factor.

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15% of people have Rh- factor

This means that P(B) = 0.15

52% of people have type O or Rh- factor.

This means that P(A \cup B) = 0.52

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This is

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With what we have

P(A \cap B) = 0.43 + 0.15 - 0.52 = 0.06

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b. Find the probability that a person does NOT have both type O blood and the Rh- factor.

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3 years ago
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