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postnew [5]
2 years ago
15

Pls help me whoever give me an correct answer they will receive a brainiest

Mathematics
1 answer:
emmainna [20.7K]2 years ago
6 0

Answer:

80

Step-by-step explanation:

The ratio is 40:1, we have to find x is x:2. 40:1=x:2, 40/1=x/2. 40=x/2, 80=x.

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Purchasing A regional survey found that 70% of all families who indicated an intention to buy a new car bought a new car within
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Answer:

If a family chosen at random bought a car, we need to find the probability that the family had not previously indicated an intention to buy a car = P(I'|B) = 0.3362

Step-by-step explanation:

Let the event that a family that intends to buy a car be I

Let the event that a family does not intend to buy a car be I'

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Let the event that a family does not buy a car in those 3 months be B'

Given,

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If a family chosen at random bought a car, we need to find the probability that the family had not previously indicated an intention to buy a car = P(I'|B)

The conditional probability P(A|B), is given as

P(A|B) = P(A n B) ÷ P(B)

So,

P(B|I) = P(B n I) ÷ P(I)

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P(B|I') = P(B n I') ÷ P(I')

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P(B) = P(B n I) + P(B n I') = 0.154 + 0.078 = 0.232

P(B') = 1 - 0.232 = 0.768

P(I'|B) = P(B n I') ÷ P(B)

= 0.078 ÷ 0.232 = 0.3362

Hope this Helps!!!

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