distribution of candidates who were enrolled for the mba entrace exam and the candidates (out of those enrolled) who passed the exam in different institutes CANDIDATES ENROLLED =8550 X-16%, P- 22%,...

distribution of candidates who were enrolled for the mba entrace exam and the candidates (out of those enrolled) who passed the exam in different institutes

CANDIDATES ENROLLED =8550

X-16%, P- 22%, Q-15%, R-10%, S-17%, T-8%, V-12%

CANDIDATES PASSED= 5700

X- 12%, P-18%, Q-17%, R-13%, S-16%, T-9%, V-15%

a)  What is the percentage of candidates passed to the candidates enrolled for institutes Q and R
together?
b)  What is the ratio of candidates passed to the candidates enrolled from institute P?
c)What makes the candidate fail the exam?