Question

Each person in a group of college students was identified by graduating year and asked when he or she preferred taking classes: morning, afternoon, or evening. The results are shown in the table. Find the probability that the student preferred morning classes given he or she is a junior. Round to the nearest thousandth. Survey of Class Times Freshman Sophomore Junior Senior Morning 20 14 16 17 Afternoon 5 10 2 7 Evening 15 15 8 14
A. 0.654
B. 0.083
C. 0.421
D. 0.615

Answer 1

@ganeshie8

Answer 2

\(\large

\begin{array}{|c|c|c|}
\hline
\text{}&\text{Fresh man}&\text{Sophomore }&\text{Junior}&\text{Senior}\\
\hline
\text{Morning}&\color{red}{20}&\color{red}{14}&\color{red}{16}&\color{red}{17}\\
\hline
\text{Afternoon}&\color{red}{5}&\color{red}{10}&\color{red}{2}&\color{red}{7}\\
\hline
\text{Evening}&\color{red}{15}&\color{red}{15}&\color{red}{8}&\color{red}{14}\\
\hline

\end{array}
\)

Answer 3

its like that ?

Answer 4

yes

Answer 5

Find the probability that the student preferred morning classes `given he or she is a junior`

Answer 6

so, Look only at \(\large \text{Junior}\) column,
forget about all other columns

Answer 7

I think it would be D

Answer 8

i dont have the answer yet,
but how did u get D ?

Answer 9

26 juniors total and 16 took morning classes
16/26=0.615

Answer 10

Excellent !!

Answer 11

lol ok thanks !

Answer 12

u wlc :)