The following pie charts represent the distribution of candidates who were enrolled for a competitive examination, and the candidates (out of those enrolled) who passed the exam from five different institutes P, Q, R, S and T.

What is the ratio of the total number of candidates enrolled in institutes Q, R and S together, to the number of candidates passed from the institutes Q, R and S together?

75 : 44

Number of candidates enrolled in institutes Q, R and S  :   Number of candidates passed from the institutes Q, R and S 

( 30% +12% +18% ) of 7500    :       ( 24% + 18% + 24%) of 4000

                 60% of 7500           :                  66% of 4000

                           75                :                       44