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iVinArrow [24]
3 years ago
6

I NEED ALGEBRA HELP, QUICK!! PLEASE!!!!!!!

Mathematics
1 answer:
garik1379 [7]3 years ago
7 0
I believe that the answer is a
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Option A

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The Blair family was one of the first to come to the original 13 colonies (now part of the USA). They had 4 children. Assuming t
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31.25% probability that the Blair family had at least 3 girls

Step-by-step explanation:

For each children, there are only two possible outcomes. Either it was a girl, or it was not. The probability of a child being a girl is independent of any other children. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

They had 4 children.

This means that n = 4

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This means that p = 0.5

Probability of at least 3 children:

P(X \geq 3) = P(X = 3) + P(X = 4)

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 3) = C_{4,3}.(0.5)^{3}.(0.5)^{1} = 0.25

P(X = 4) = C_{4,4}.(0.5)^{4}.(0.5)^{0} = 0.0625

P(X \geq 3) = P(X = 3) + P(X = 4) = 0.25 + 0.0625 = 0.3125

31.25% probability that the Blair family had at least 3 girls

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You and your best friend decide to go to dinner at Chickfila. You each
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= $28.90

Step-by-step explanation:

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Four research teams each used a different method to collect data on how fast a new strain of maize sprouts. Assume that they all
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<span>Confidence Level: 95%; Confidence Interval: 44 to 46</span>
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When Maggie hooks her dog up to a rope that is staked in the yard, the dog can walk a distance of about 76 feet along the circum
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12.1

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76/2π

= 38/π

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