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bonufazy [111]
3 years ago
9

Who can get this correct? Marking most Brainly

Mathematics
1 answer:
Helen [10]3 years ago
4 0

Answer:

I think it's A

Step-by-step explanation:

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In a clinical study, volunteers are tested for a gene that has been found to increase the risk for a disease. The probability th
MrRa [10]

Answer:

a) 0.984

b) 20 people

Step-by-step explanation:

a)

If The probability that a person carries the gene is 0.1, then in a sample of 20 people, 2 should carry the gene.

Now, we want to know how many samples there are with this property.

Since we have 20 elements where 18 are alike (do not carry the gene) and 2 are alike (carry the gene), we have to compute the number of permutations of 20 elements in which 18 are alike and 2 are alike. This number is

\frac{20!}{18!2!}=190

In this 190 20-tuples there are only 3 where the 2 carriers of the gene are in the first 3 places, namely

(1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0)

(1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0)

(0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0)

where 1=carries the gene, 0=does not carry the gene.

So there are 190-3 = 187 elements in which the first 3 elements have no 2 carriers, hence the probability that 4 or more people will have to be tested until 2 of them with the gene are detected is 187/190 = 0.984 (98.4%) rounded to three decimal places.

b)

Given that the probability that a person carries the gene is 0.1, then in a sample of 20 people, 20*0.1 = 2 should carry the gene.

4 0
3 years ago
Lebron keeps track of his life relative to the year he was born . Relative to when he was born ,his brother was born in year -3
elena-s [515]

Answer:

A, because -3 is a negative integer it is to the left of zero, 7 is a positive integer is it to the right of zero.

Hope this helps <3

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3 years ago
Area as a sum (-2+x)5
Nezavi [6.7K]

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21

Step-by-step explanation:

lol

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If data set A has a larger standard deviation than data set B data set A is less spread out than data set b.
umka21 [38]
Where is
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if 48% of the students at a certain college are female and there are 2,400 female students, what is the total amount of students
Mekhanik [1.2K]

Answer:5

Step-by-step explanation: you have to dived into two groups into five.

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3 years ago
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