Mathematics, 25.12.2020 06:10 aylorcadence

Out of 153 students appeared in an examination the ratio of the students who got the A+ A and B+ grades is 2:4:5 and if 21 students got the other grades then, how many students got the A+, A and B+ grades?

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Out of 153 students appeared in an examination the ratio of the students who got the A+ A and B+ gra...