Problema Solution
Ryan got 80% of the problems correct on a 25-problem test, 90% on a 40-problem test, and 70% on a 10-problem test. What percent of all the problems did Ryan answer correctly?
Answer provided by our tutors
the total number of problems answered correctly is:
0.80*25 + 0.90*40 + 0.70*10 = 63
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the total number of problems is:
25 + 40 + 10 = 75
the percent of the problems that Ryan answered correctly is:
(the number of problems answered correctly/total number of problems)*100
(63/75)*100 = 84%
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