Question

Evaluate the statistics expression:39C1

Answer 1

Answer:  39

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Explanation:

You can use the nCr formula shown below

$_n C _r = \frac{n!}{r!*(n-r)!}$

where n = 39 and r = 1. However, you could also use the identity

$_n C _{1} = n$

which basically says there are n ways to pick 1 item if you are given a choice of n items. In this specific case, we have 39 items total, and there are 39 ways to pick one item.