Chapter 4, Problem 1CQQ

To determine

To find: The probability of wrong answer.

Answer to Problem 1CQQ

The correct probability is 4/5.

Explanation of Solution

Given:

Number of options = 5

That is, a,b,c,d,e

Only one correct answer among the five one.

Formula used:

The formula to calculate the probability of an event is:

  $P\left(\text{Event}\right)=\frac{\text{Number}\text{of}\text{favorable}\text{outcomes}}{\text{Total}\text{outcomes}}$

The probability that one can make wrong choice can be calculated as:

Number of correct answers = 1

Number of wrong guess = 4

Total number of options = 5

  $\begin{array}{c}P\left(\text{wrong answer}\right)=\frac{\text{Number}\text{of}\text{favorable}\text{outcomes}}{\text{Total}\text{outcomes}}\\ =\frac{4}{5}\end{array}$

Hence, the correct probability is 4/5.