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The average marks of a class of 48 students is 35. Of them, two score zero, of the rest, the first 30 scored an average of 40, the next fourteen scored an average of 20. If the remaining two scored equal marks, what are their individual marks?
  • a)
    80
  • b)
    75
  • c)
    90
  • d)
    100
Correct answer is option 'D'. Can you explain this answer?
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The average marks of a class of 48 students is 35. Of them, two score ...
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The average marks of a class of 48 students is 35. Of them, two score ...
48×35=2×0+(30×40)+(14×20)+2×
2x=200
×=100
100 Marks are scored individually
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The average marks of a class of 48 students is 35. Of them, two score ...
Total scored marks by 48 st. =35×48 =1680 Total scored marks by 46 st. = 1680(as 2 st. scored 0) Marks scored by first 30 st. = 30×40 =1200 Marks scored by next 14 st. = 14×20 = 280 Marks obtain by remaining two students =1680-0-1200-280=200 Marks obtained by each st. =200/2 =100
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The average marks of a class of 48 students is 35. Of them, two score zero, of the rest, the first 30 scored an average of 40, the next fourteen scored an average of 20. If the remaining two scored equal marks, what are their individual marks?a)80b)75c)90d)100Correct answer is option 'D'. Can you explain this answer?
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