CXC CSEC Maths January 2021 Question 5 Solutions

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The last question could have been worked out easier and differently because if 120 is the total number of students and 39 students passed with Range III, THEN SUBTRACT the 39 from 120 and get 81.
2/9 × 81 = 18 Range 1
4/9 × 81 = 36 Range II
3/9 × 81 = 27 Range IV
THOSE WHO PASSED WITH RANGES 1, 2 AND 3
18 + 36 + 39 = 93 STUDENTS

moniquegilmore