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Brums [2.3K]
3 years ago
6

[20 POINTS] At a certain high school, 15 students play stringed instruments, 20 students play brass instruments, and 5 students

play neither stringed nor brass instruments. what is the probability that a randomly selected student plays either a string or brass instrument?

Mathematics
1 answer:
Likurg_2 [28]3 years ago
5 0

Answer:

P(A\cup B)= 0.875

Step-by-step explanation:

From the diagram, none of the students play both instruments.

This means the two events are mutually exclusive.

P(A\cup B)=P(A)+P(B)

The number of people playing instruments is 20.

P(A\cup B)= \frac{20}{40}  +  \frac{15}{40}

P(A\cup B)= \frac{35}{40}

P(A\cup B)= 0.875

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Answer:

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Step-by-step explanation:

The given measure of the angles formed are;

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According to circle theorem, the angle formed by a chord and a tangent of a circle is given by half of the measure of the arc intercepted by the chord in the direction of the angle;

Therefore;

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