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In test, Chara correctly answered 18 out of the 20-item test. At this rate, how many correct answers will she get on a 50-item test?
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PLEASE HELP
In test, Chara correctly answered 18 out of the 20-item test. At this rate, how many correct answers will she get on a 50-item test?
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Answer:
45
Step-by-step explanation:
We use Direct proportion
18:20=n:50
18×50=900
20×n=20n
900 20n
------ --------
20 20
900÷20=45