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Evaluate 9 C 5. 24 3,024 45 126
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Evaluate 9 C 5. 24 3,024 45 126
asked
Sep 16, 2018
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Evaluate 9 C 5.
24
3,024
45
126
Mathematics
high-school
Dst
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Dst
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Apply the formula of n!/{(r!)(n-r)!}
Where n= 9
And r= 5
9!/{(5!)(9-5)!}
= 9!/{(5!)(4)!}
= ( 9×8×7×6×5×4×3×2×1)/(5×4×3×2×1) (4×3×2×1)
= 126.
So, option d is correct.
AppleBee
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Sep 17, 2018
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AppleBee
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a quics way to do this :-
9C5 = 9*8*7*6*5 3 * 7 * 6 = 126
------------- =
5*4*3*2*1
Ivanov Maksim
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Sep 22, 2018
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Ivanov Maksim
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