Each of the three colleges X, Y and Z has three streams – Science, Arts and Commerce. Number of students in Commerce stream of college X is 60 more than the number of students in Science stream of college X. The number of students in Arts stream of college X is 150% of the number of students in Science stream of the same college. Number of students in Commerce stream of college Y is 30 less than the number of students in the same stream of college X. The number of students in Arts stream of college Y is 510 which is 60 more than the number of students in the same stream of college X. Number of students in Commerce stream of college Y is 22 2/9 % more than the number of students in Science stream of the same college. The number of students in Science stream of college Z is 40% less than the number of students in the same stream of college X and the number of students in Science stream of college Z is 60 more than the number of students in Arts stream of the same college. Total number of students in commerce stream of all the colleges together is 1170.