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angeles86
24.07.2019 •
Mathematics
The chorus has six sopranos and eight baritones. in how many ways can the director choose a quartet that contains at least one soprano?
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Ответ:
The number of possible quartets that you can get with 14 musician is:
Now, the number of possible quartets without a soprano that you can have is:
Therefore, the number of quarters that contains at list one soprano will be the number of possible quarters minus the number of quarters without a soprano:
We can conclude that the director can choose a quarter which contains at least one soprano in 931 ways.
Ответ:
If you meant z instead of 2, the correct answer is 7. (:
Step-by-step explanation:
x - y + z = __
7 - 1 + 1 = __
6 + 1 = __
7