In an examination, 60% of the candidates passed in English a
In an examination, 60% of the candidates passed in English and 70% of the can- didates passed in Mathematics, but 20% failed in both of these subjects. If 2500 candidates passed in both the subjects, the number of candidates that appeared at the examination was-
A3000
B3500
C4000
D5000
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Answer is : 5000
Explanation:
Students passed in English = 60%
Students failed in both subjects = 20%
therefore Students passed only Mathematics is 20%Students passed in Mathematics= 70%
Students failed in both subjects = 20%
therefore Students passed only English is 10%Total Appeared In Exam = all fail + only English pass + only Mathematics pass + both English and Mathematics pass.
Total Appeared In Exam (100%) = 20% + 10% + 20% + both English and Mathematics pass.
Total Appeared In Exam(100%) = 50% + both English and Mathematics pass.
Total Appeared In Exam (100%) = 50% + 2500
Total Appeared In Exam (100%) = 2500 + 2500
= 5000
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