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Silly Gilly
Mathematics
11 July, 00:09
Evaluate
11C8 and 7P4.
11C8=
7P4=
+5
Answers (
1
)
Rocco
11 July, 00:28
0
11C8
= 11 x 10 x 9 x 8! / (8!) (3!)
= (11 x 10 x 9) / (3 x 2 x 1)
= 990 / 6
= 165
7P4
= 7 x 6 x 5 x 4 x 3! / (3!)
= (7 x 6 x 5 x 4)
= 840
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