On last week's math test, 32 students received passing grades and 16 students did not receive passing grades. What is the ratio of the number of students who passed the test to the total number of students who took the test?
A. 1/2
B. 2/3
C. 3/2
D. 2/1
B. 2/3
32 students passed the test and 16 students did not pass. So the total number of students who took the test is 32 + 16 = 48.
Therefore, the ratio of the number of students who passed the test to the total number of students who took the test is 32/48 = 2/3.