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Home Q & A Board Science-Related Homework Help Mathematics
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Hog95 Hog95
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8 years ago
Advanced topic: In a school band, 9 kids play string instruments, 10 kids play woodwind instruments, 7 kids play brass instruments, and 4 kids play percussion instruments.
a.   What is the probability that you randomly select a kid who plays a string or percussion instrument?
b.   What is the probability that you randomly select a kid who does not play a brass instrument?
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padrepadre
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8 years ago Edited: A year ago, bio_man
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A)   .43

The probability of an event is calculated by dividing the number of favorable outcome by the total number of outcomes in the situation.

In this case,

Number of favorable outcomes = 9 + 4 = 13

Total number of outcomes = 9 + 10 + 7 + 4 = 30

Probability = 13 / 30 = .43

B)   .77
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Hog95 Author
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#2
8 years ago
Thank you so much for the reply. Your answer makes a lot of sense.
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#3
A year ago
Thanks
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