The probabilities by subject of on-time assignment submission and on-time arrival to class are given in the table. What is the chance that the subject is physics if an assignment is submitted on time?

Subject: On-time Assignment: On-time Arrival to Class:
PHYSICS 89.7% 82.3%
MATH 88.2% 88.7%
CHEMISTRY 89.4% 83.1%
BIOLOGY 90.1% 82.4%
TOTAL 88.5% 84.7%

A. 82.3%
B. 88.5%
C. 89.7%
D. Insufficient data

Question

The probabilities by subject of on-time assignment submission and on-time arrival to class are given in the table. What is the chance that the subject is physics if an assignment is submitted on time?

Subject: On-time Assignment: On-time Arrival to Class:
PHYSICS 89.7% 82.3%
MATH 88.2% 88.7%
CHEMISTRY 89.4% 83.1%
BIOLOGY 90.1% 82.4%
TOTAL 88.5% 84.7%

A. 82.3%
B. 88.5%
C. 89.7%
D. Insufficient data

dude · Answer

Look at the 2 conditions they asked you to look for Physics and submitted on-time (Assignment) $\begin{array}{|l|l|I|}\hline \sf{Subject}&\sf{On-time~Assignment}&\sf{On-time~Arrival~to~Class}\\hline \sf{PHYSICS}&\sf{89.7\%}&\sf{82.3\%}\\hline \end{array}$ This is the row we want (Physics row), now to see which percent, look for the second condition (On-time Assignment) Which is the Left Column Voila!