Question

13 divided by 39 upon 40 ​

Answer 1

1/13.33

By dividing 13 by 39 first we get 3 then divide 40 by 3 we get 1/13.33

Answer 2

Answer:

$13 \div \binom{39}{40} \\ = 13 \times \binom{40}{39} \\ = \binom{40}{3}$

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