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A student earned a grade of 80% on a math test that had 20 problems. How many problems on this test did the student answer correctly?

A student earned a grade of 80% on a math test that had 20 problems. How many problems on this test did the student answer correctly?

Algebra and Trigonometry (MindTap Course List)
Algebra and Trigonometry (MindTap Course List)
4th Edition
ISBN:9781305071742
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter14: Counting And Probability
Section14.CT: Chapter Test
Problem 4CT: Over the past year, John has purchased 30 books. a In how many ways can he pick four of these books...
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d) On average, the post office processes 45.6 letters every hour. How many letters can the office process during the 9 hours it is open? e) During Christmas, the post office opens 12 hours a day. Compared to usual days, how many more letters can the post office process? 6) A student earned a grade of 80% on a math test that had 20 problems. How many problems on this test did the student answer correctly? 7) Children has to pick their favourite sport from basketball, football and hockey. 3 chose basketball and - chose hockey. What percentage chose football? 10 4 8) In a fruit survey, children choose their favourite fruit out of apples, bananas and watermelon. 29% chose apples and chose bananas. What percentage chose watermelon?
Transcribed Image Text:d) On average, the post office processes 45.6 letters every hour. How many letters can the office process during the 9 hours it is open? e) During Christmas, the post office opens 12 hours a day. Compared to usual days, how many more letters can the post office process? 6) A student earned a grade of 80% on a math test that had 20 problems. How many problems on this test did the student answer correctly? 7) Children has to pick their favourite sport from basketball, football and hockey. 3 chose basketball and - chose hockey. What percentage chose football? 10 4 8) In a fruit survey, children choose their favourite fruit out of apples, bananas and watermelon. 29% chose apples and chose bananas. What percentage chose watermelon?
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