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What is the difference between the total number of students who have enrolled for course on C++ and SQL together from college S and the total number of students who have enrolled for the same course together from college R ?
134
116
128
104
96
134
116
128
104
96
Solution
Total number of students who have enrolled for course C++ from college S is
= 35% of 2000 = 0.35 × 2000 = 700
Total number of students who have enrolled for course SQL from college S is
= 16% of 1800 =0.16 × 1800 = 288
Total number of students who have enrolled for course C++ and SQL together from college S is
= 700 + 288 = 988
Total number of students who have enrolled for course C++ and SQL together from college R is
= (19% of 2000) + (28% of 1800)
= (0.19 × 2000) + (0.28 × 1800)
= 380 + 504 = 884
Required difference is = 988 − 884 = 104
