Answer:
45
Step-by-step explanation:
Since arrangement does not matter, we use combinations.
C(10,2)=10!/(10-2)!2!
C(10,2)=10!/8!2!
C(10,2)=10(9)/2
C(10,2)=90/2
C(10,2)=45
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Answers & Comments
Answer:
45
Step-by-step explanation:
Since arrangement does not matter, we use combinations.
C(10,2)=10!/(10-2)!2!
C(10,2)=10!/8!2!
C(10,2)=10(9)/2
C(10,2)=90/2
C(10,2)=45