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The number of triangles whose vertices a...

The number of triangles whose vertices are at the vertices of a octagon but none of the sides of such triangles are taken from the sides of the octagon.

A

8

B

15

C

16

D

none of these

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The correct Answer is:
C
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ARIHANT SSC-PERMUTATIONS & COMBINATIONS -EXERCISE (LEVEL-2)
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  7. The number of positive integral solutions of abc = 42 is:

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