Question

Suppose we want to choose letters, without replacement, from distinct letters.

Answer 1

The number of ways when the choice is not relevant is 1716

How to determine the number of ways?

The number of letters are:

Letter, n = 13

The letter to choose are:

r = 6

Relevant choice

When the choice is relevant, we have:

$Ways = ^nP_r$

This gives

$Ways = ^{13}P_6$

Evaluate

Ways = 241235520

Hence, the number of ways when the choice is relevant is 1235520

Not relevant choice

When the choice is not relevant, we have:

$Ways = ^nC_r$

This gives

$Ways = ^{13}C_6$

Evaluate

Ways = 1716

Hence, the number of ways when the choice is not relevant is 1716

Read more about combination at:

brainly.com/question/11732255

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