Mathematics, 02.08.2019 19:50, egyptforrest9892

25% of the students in a class got an a+ on a test. 30% of the rest got an a−. 40% of the rest got grade b. the rest of students scored lower than b. what percent of all students got a grade lower than b?

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25% of the students in a class got an a+ on a test. 30% of the rest got an a−. 40% of the rest got g...