2000004502 | math4u.vsb.cz

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Level:

Project ID:

2000004502

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0

Clonable:

0

Easy:

1

Specify the number of all two-element subsets of the set

{A, B, C, D, E}

.

(\binom{5}{2}) = 10

\frac{5!}{2!} = 30

\frac{5!}{3!} = 20

5