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 Submission 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

Answer 1

old question but will answer anyway so this can be closed

--> What is the chance that the subject is physics if an assignment is submitted on time?

this is a conditional probability. simply calculate

(physics assignments submitted on time) / (all assignments submitted on time)