Based on a recent Gallup survey, we define the following probability model for the number X of daily cups of coffee consumed by Americans.
?
?
$$\begin{array} { | l | l | l | l | l | l | }
\hline \boldsymbol { X } & 0 & 1 & 2 & 3 & 4 \text { or more } \
\hline \text { Probability } & 0.36 & 0.26 & 0.19 & 0.09 & ? \
\hline
\end{array}$$ What is the probability that an American consumes 4 or more cups of coffee daily?

Question

Based on a recent Gallup survey, we define the following probability model for the number X of daily cups of coffee consumed by Americans.
?
?
$$\begin{array} { | l | l | l | l | l | l | } 
\hline \boldsymbol { X } & 0 & 1 & 2 & 3 & 4 \text { or more } \
\hline \text { Probability } & 0.36 & 0.26 & 0.19 & 0.09 & ? \
\hline
\end{array}$$ What is the probability that an American consumes 4 or more cups of coffee daily?

Quizplus · Accepted Answer

The probabilities must sum to 1. Adding the given probabilities: 0.36 + 0.26 + 0.19 + 0.09 = 0.90. Therefore, the probability for 4 or more cups is 1 - 0.90 = 0.10.

Based on a Recent Gallup Survey, We Define the Following