The probability that a student who plays an instrument is in band is 20/25.
The formula of the probability of an event is-
[tex]P(A) = \frac{Number of Favorable Outcome}{Total Number of Favorable Outcome}[/tex]
or [tex]P(A) = \frac{n(A)}{n(S)}[/tex] where,
P(A) is the probability of an event "A"
n(A) is the number of favorable outcome.
n(S) is the total number of events in the sample space.
n(A) the number of student who plays an instrument is in band is 20.
n(S) total number of student who plays an instrument is 25.
All given value put in formula-
P(A) = 20/25.
Hence, the probability that a student who play an instrument is in band is 20/25.
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