Question

In how many different ways can you answer a multiple-choice test that has 5 questions and 3 choices for each answer?
15
125
243

Answer 1

15

Answer 2

You can answer each multiple choice question in 3 ways.
Now, you can answer two multiple choice questions in 9 ways.

So, the formula is
\(\Large \color{purple}{\rightarrow 3^n }\)

n = number of multiple choice questions.

\(\Large \color{purple}{\rightarrow 3^5}\)
\(\Large \color{purple}{\rightarrow 243 }\)

Answer 3

5C1 * 3C1 = 15??