There are 25 students in a sixth-grade class. On a cold winter day in February, many of the students had runny noses and sore throats. After examining each student, the school nurse constructed the following table:

$\begin{array} { l c c }
& \text { Sore throat } & \text { No sore throat } \
\text { Runny nose } & 5 & 5 \
\text { No runny nose } & 3 & 12
\end{array}$

Find the probability that a randomly-selected student has neither a runny nose nor a sore throat.
A) 0.48
B) 0.32
C) 0.20
D) 0.80

Question

There are 25 students in a sixth-grade class. On a cold winter day in February, many of the students had runny noses and sore throats. After examining each student, the school nurse constructed the following table:

$\begin{array} { l c c } 
& \text { Sore throat } & \text { No sore throat } \
\text { Runny nose } & 5 & 5 \
\text { No runny nose } & 3 & 12
\end{array}$

Find the probability that a randomly-selected student has neither a runny nose nor a sore throat.
A) 0.48
B) 0.32
C) 0.20
D) 0.80

Quizplus · Accepted Answer

The probability that a randomly-selected student has neither a runny nose nor a sore throat is calculated by dividing the number of students with neither condition (12) by the total number of students (25), which gives $ \frac{12}{25} = 0.48 $.

There Are 25 Students in a Sixth-Grade Class Find the Probability That a Randomly-Selected Student Has Neither a Cold