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s344n2d4d5 [400]
2 years ago
15

Which one is correct a b c d

Mathematics
2 answers:
xeze [42]2 years ago
3 0

Answer:

b

Step-by-step explanation:

Goryan [66]2 years ago
3 0

its b                                                                                                sooooooooooooooooooooooooooooo

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At a certain high school, 15 students play stringed instruments and
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Answer:

<em>0</em> is the probability that a  randomly selected student plays both a stringed and a brass  instrument.

Step-by-step explanation:

Given that:

Number of students who play stringed instruments, N(A) = 15

Number of students who play brass instruments, N(B) = 20

Number of students who play neither, N(A \cup B)' = 5

<u>To find:</u>

The probability that a randomly selected students plays both = ?

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Total Number of students = N(A)+N(B)+N(A \cup B)' =15 + 20 + 5 = 40

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N(A\cap B) =0

Formula for probability of an event E can be observed as:

P(E) = \dfrac{\text{Number of favorable cases}}{\text {Total number of cases}}

P(A\cap B) = \dfrac{N(A\cap B)}{N(U)}\\\Rightarrow \dfrac{0}{40}\\\Rightarrow P(A\cap B) = 0

So, <em>0</em> is the probability that a  randomly selected student plays both a stringed and a brass  instrument.

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2 years ago
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Step-by-step explanation:

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Step-by-step explanation:

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