Concept explainers
To calculate: The number of ways to answer 10 true false question.
Answer to Problem 8WE
The number of ways to are
Explanation of Solution
Given information:
There are 10 true false questions and each question need not to be answered.
Formula used:
Fundamental counting principle states that if there are m ways to make a selection and n ways to make a second selection then there are
Calculation:
Consider the provided information that there are 10 true false questions and each question need not to be answered.
There are 3 choices for first question. Either the answer can be true or false or can be unanswered.
Similarly for second question there are 2 choices for first question. Either the answer can be true or false or can be unanswered.
That is for each question there are 2 choices for first question. Either the answer can be true or false or can be unanswered.
There are 10 questions.
Recall that Fundamental counting principle states that if there are m ways to make a selection and n ways to make a second selection then there are
Therefore, the number of ways to select are,
Thus, the number of ways to answer 10 question are
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