In an orchestra, 20 people can play stringed instruments, 18 can play brass, and 14 can play percussion. Further, 8 of the performers can play both strings and brass, whereas 8 can play both strings and percussion. If no one can play all three types of instruments, what are the maximum and minimum numbers of people in the orchestra? (Hint: Consider expressing the numbers in some of the regions of your diagram in terms of a single unknown, say x.) The maximum number of people is and the minimum number of people is
In an orchestra, 20 people can play stringed instruments, 18 can play brass, and 14 can play percussion. Further, 8 of the performers can play both strings and brass, whereas 8 can play both strings and percussion. If no one can play all three types of instruments, what are the maximum and minimum numbers of people in the orchestra? (Hint: Consider expressing the numbers in some of the regions of your diagram in terms of a single unknown, say x.) The maximum number of people is and the minimum number of people is
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Given conditions.
Consider the possible events to create the orchestra.
A : People who plays stringed instruments.
B : People who plays brass.
C : People who plays percussion.
A int B : People who plays stringed instruments and brass.
B int C : People who plays brass and percussion.
C int A : People who plays percussio and stringed instruments.
A int B int C : People who plays stringed instruments, brass and percussion.
A U B U C = People who are in orchestra or plays atleast one instrument.
Note that ( U ) , ( int ) represents union and intersection of sets.
| X | represents the cardinality of the set X.
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