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In an examination , 40% of the candidates wrote their anwers in Hindi and the other in English . The average marks of the candidates written in Hindi is 74 and the average marks of the candidates written in English is 77. What is the average marks of all the candidates ?
A. 75.5
B. 75.8
C. `76.0`
D. 76.8

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Correct Answer - B
(b) Let total number of candidates =100
`:.` Total marks of 40 candidates `=40xx74`
Total marks of 60 candidates `=60xx77`
`:.` Required average marks `=(40xx74+60xx77)/(100)`
`=(2960+4620)/(100)=(7580)/(100)=75.80`

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