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 student…

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asked Sep 6, 2019 231k views

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Dan Manion · Answer 1 · 2019-09-11T19:50:28+0000

5% of the students got a grade lower than B. The percentage of students in each category should sum up to 1, or 100% of the students. Therefore, 100%-25%-30%-40%=5% of the students scored lower than B.

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 student…

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