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Wittaler [7]
3 years ago
12

A cooler has 12 apple juices and 15 grape juices. 9 of the apple juices are sugar free and 5 of the grape juices are sugar free.

A juice is chosen at random. Given that the juice is NOT sugar free, find the probability that it is grape juice. A) 10 13 B) 15 27 C) 2 3 D) 3 4
Mathematics
1 answer:
Fantom [35]3 years ago
7 0

altogether there are 27 juices

probability of apple juice = 12/27

probability of grape juice = 15/27

probability of sugar free = 14/27

probability of not sugar free = 13/27

They already said the juice that is chosen is definitely NOT sugar free, so we dont need to include the probability of that because we already know it.

apple juice = 12

sugar free = 9

12 - 9 = 3 not sugar free

grape juice = 15

sugar free = 5

15 - 5 = 10 not sugar free

we need the not sugar free ones, so 3 + 10 = 13

out of 13 not sugar free, 10 are grape juice, so the probability of not sugar free grape juice = 10/13, so the answer is A)

srry if this is too long, i take too long to explain things, but i hope this still helps

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weeeeeb [17]

Answer:

0.0367 = 3.67% probability that exactly 6 patients will die

Step-by-step explanation:

The patients are chosen without replacement, which means that the hypergeometric distribution is used to solve this question.

Hypergeometric distribution:

The probability of x sucesses is given by the following formula:

P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}

In which:

x is the number of sucesses.

N is the size of the population.

n is the size of the sample.

k is the total number of desired outcomes.

Combinations formula:

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)!}

In this question, we have that:

20 patients means that N = 20

Sample of 8 means that n = 8

9 have the heart problem, so k = 9

What is the probability that exactly 6 patients will die?

This is P(X = 6).

P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}

P(X = 6) = h(6,20,8,9) = \frac{C_{9,6}*C_{11,2}}{C_{20,8}} = 0.0367

0.0367 = 3.67% probability that exactly 6 patients will die

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3 years ago
Question 4 of 25
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Answer:

i

Step-by-step explanation:

l

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