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Klio2033 [76]
3 years ago
5

A student has passed 60 percent of the 20 quizzes he has written so far successfully. if the student writes 50 quizzes during th

e year, and passes 80 percent of the remaining quizzes successfully, what would his average percentile be?answer:
Mathematics
2 answers:
Lady bird [3.3K]3 years ago
6 0
60% of 20 is (0.6 x 20) = 12 passes There are a further 30 quizzes remaining (50 total during the year minus 20 already written) 80% of 30 is (0.8 x 30) = 24 passes The student has passed (12 + 24) = 36 quizzes out of 50 total, giving an overall pass percentage of ((36 / 50) x 100)) = 72%.
ivann1987 [24]3 years ago
4 0

His average percentile is 72%

  • A student passed 60 percent out of 20 quizzes
  • 50 quizzes in a year and passed 80 percent of the remaining quizzes
  • The success rate for all his quizzes for the entire year is unknown.
<h2>Further Explanation</h2>

A student passed 60 percent out of 20 quizzes, which can be expressed as  

\frac{60}{100} x 20

60 x \frac{20}{100}

\frac{1200}{100}

12  

Therefore the remaining quizzes will be:

50 - 20

30 quizzes

Also, we have to determine the 80% of 30 quizzes, which can also be expressed as

\frac{80}{100} x 30

80 x \frac{30}{100}

\frac{2400}{100}

24

To find the total remaining quizzes, then we have to add both value together

Therefore, we have

30 + 24

36

Thus, the total remaining quizzes is 36.

Now, if the student writes 50 quizzes during the year, his average percentile would be:

\frac{36}{50} x 100%

0.72 x 100%

72%

Therefore, his average percentile is 72%

LEARN MORE:

  • A student has successfully passed 60 percent of the 20 quizzes he has written so far brainly.com/question/10199310
  • A student has successfully passed 60 percent of the 20 quizzes he has written so far brainly.com/question/6687439

KEYWORDS:

  • quizzes
  • students
  • percentage
  • success year  
  • entire year
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