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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 grade B. The rest of students scored lower than B. What percent of all student…

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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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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User Tobias Krogh
by
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2 Answers

4 votes

Answer:

31.5

Explanation:

Just trust me. If it's wrong I am so very sorry...

answered
User Mario Rudman
by
8.1k points
4 votes
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.
answered
User Dan Manion
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7.5k points
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