Question

A true-false test contains 21 questions. In how many different ways can this test be completed.

Answer 1

There are 5.1090942e+19 different ways this test can be completed

In how many different ways can this test be completed?

The given parameters are:

Questions, n =21

Options = 2 i.e. true or false

The number of different ways this test can be completed is calculated as:

Ways = n!

Substitute 21 for n in the above equation.

So, we have:

Ways = 21!

Expand the above equation

Ways = 21 * 20 * 19 * ...... 1

Evaluate the products

Ways = 5.1090942e+19

Hence, there are 5.1090942e+19 different ways this test can be completed

Read more about factorials at:

brainly.com/question/25997932

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