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3 years ago

What is the probability that a person who is older than 35 years has a hemoglobin level between 9 and 11?

Mathematics

1 answer:

prohojiy [21]3 years ago

5 0

There are some numbers missing in your table. We think the values are supposed to be the ones shown in the attachment.

The number of people that are older than 35 and have a hemoglobin level between 9 and 11 is 46. The total number of people older than 35 is 162, so the proportion of people older than 35 with the hemoglobin level of interest is ...

... 46/162 ≈ 0.284

The appropriate choice is B. 0.284.

_____

<em>Here's how you get there with the formula for conditional probability.</em>

P(9-11 | >35) = P(9-11 & >35)/P(>35) . . . . conditional probability formula

P(9-11 | >35) = (46/429) / (162/429) = 46/162

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Answer:

Step-by-step explanation:

1. here you go mate

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2 years ago

Assume that random guesses are made for eight multiple choice questions on an SAT test, so that there are n= 8 trials, each with

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Answer:

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Step-by-step explanation:

So all of the numbers of correct answers less than 4 are 0,1,2,3

We need to calculate the probability for each separately and then add them together.

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The combination formula is: ! / (!(−)!)

So the n would always =8, and the r would be 0,1,2,3. So you would have to calculate it for 0,1,2,3 Separately. This can be done by hand or you can use a simple combinations calculator online.

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The combination is 1,

1 x 0.3^0 x 0.7^8-0 =

0.057648

For 1;

The combination is 8,

8 x 0.3^1 x 0.7^8-1 =

0.19765

For 2;

The combination is 28

28 x 0.3^2 x 0.7^8-2 =

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For 3;

The combination is 56

56 x 0.3^3 x 0.7^8-3 =

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All that’s left is to add these four numbers;

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