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Earn +20 ptsQ: Which was the first locker touched by both students 12 and 20?
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What students both touched lockers 13 and 81?
1,053
In one school 65 students speak spanish and 49 students speak Japanese. if 80 students speak either spanish or Japanese how many students speak both?
First you add 65+49=114 Then you subtract 114-80=34 So 34 students speak both.
A math test has two problems The first was solved by 70 percent of the students The second was solved by 60 percent Every student solved at least one of the problems Nine students solved both problem?
.7x-.6x=9, .1x=9, x=9/.1=90 students
In a group of 60 students 14 students take Algebra 1 20 students take Algebra 2 and 7 students take both subjects. How many students don't take either of these subjects?
33
What are Venn diagrams and how are they useful?
A picture of a Venn diagram is in the related links. They are useful because they help you map out problems such as "If there are 3 students in math, 5 students in science and 6 students in total, how many are in both math and science?" To this, you can use the Venn diagram to reason that since there seem to be 8 students in total if math and science are separate, there must be 2 students in both classes.
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