Mean marks of salim in 5 subject is 78 . he got 76,78,80and 77 marks respectively in english, maths, science, social science marks .how many marks did salim get in hindi ?
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Answer:79
Step-by-step explanation: Let Hindi marks be x.
(76+80+78+77+x)/5=78
=>311+x=390
So, x=390-311=79
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