The Number of Customers in a Line at a Supermarket

question 3

Multiple Choice

The number of customers in a line at a supermarket express checkout counter is a random variable with the following probability distribution.

$\begin{array} { c | c | c | c | c | c | c } \boldsymbol { x } & 0 & 1 & 2 & 3 & 4 & 5 \\\hline \boldsymbol { P } ( \boldsymbol { x } ) & 0.08 & 0.26 & 0.32 & 0.16 & 0.11 & 0.07\end{array}$

Find the probability that there are fewer than four people in line.

• A) 0.18
• B) 0.82
• C) 0.11
• D) 0.93

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Definitions:

==

An equality operator used in programming languages to compare two values, returning true if equal and false otherwise.

Nested If

A conditional statement within another conditional statement, allowing for more complex decision-making paths.

If-Else

A conditional statement in programming that executes a block of code if a specified condition is true, and another block if the condition is false.

Switch Statement

A control statement in programming that allows for the execution of different parts of code based on the value of a variable or expression.