Question: Suppose we want to choose $ letters, without replacement, from 15 distinct letters. (a) How many ways can this be done, if the order of

Suppose we want to choose $ letters, without replacement, from 15 distinct letters. (a) How many ways can this be done, if the order of the choices is not relevant? X (b) How many ways can this be done, if the order of the choices is relevant

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The quality of the argumentation

The status rule: We tend to have more confidence in information presented by someone who has a relatively high status and rank in society than by someone who hasnt.

The spatial rule: The closer spatial proximity we have to an event, the more importance we will attach to it.