Thirty students took a calculus exam. Of the students who passed the exam, 8 students earned an A, 9 earned a B, 6 earned a C, and 3 earned a D. If a single student is randomly chosen, what is the probability that the student did NOT pass the exam? Provide the final answer as a fraction.

4/30 or 2/15

Step-by-step explanation:

total of student with either A,B,C, or D equals 26 which means 4 did not pass

what is the starting amount? the question is not clear sorry.

step-by-step explanation:

b is 38 degrees.

a is 52 degrees.

this is because if b is 38 and a is 14 degrees more than b than 38+14=52 and 52+38=90 degrees. hope this .