STEP BY STEP PLS A teacher divided the class into two groups of equal size. ▪︎3/5 of the first group are right-handed. ▪︎8

Question

STEP BY STEP PLS
A teacher divided the class into two groups of equal size.
▪︎3/5 of the first group are right-handed.
▪︎80% of the second group are right-handed.
What fraction of the class is right-handed?
А. 8/9

B.4/5

C.7/10

D.5/7​

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Thu Giang 4 years 2021-08-10T21:14:08+00:00 1 Answers 145 views 0

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  1. thuhuong
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    2021-08-10T21:15:56+00:00
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    C ( To make things simple, let’s turn 80% into a fraction, 8/10. To get a common denominator let’s turn 8/10 into 4/5. Since they are both of equal size, the first group would have 2/5 left-handed people and the second 1/5 left-handed people. Let’s imagine that each group has 5 people in it. There would be 10 people in total. There is 1 person for each fifth so we can add now. 4 + 3 = 7 right handed people. To check, 2 + 1 = 3 and 3 + 7 = 10. so 7/10 of the class is right-handed. )

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