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In a class the average mark is 50. 20% of the students scored 80 each, 30% scored 40 each and the remaining students scored x each. The val…

2260Medium DSSSB TGT Computer Science 0 replies 1 views
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In a class the average mark is 50. 20% of the students scored 80 each, 30% scored 40 each and the remaining students scored x each. The value of x is

  • A44
  • B50
  • C48
  • D40
Correct answer: A

Explanation

0.2 × 80 + 0.3 × 40 + 0.5x = 50 gives 16 + 12 + 0.5x = 50, so x = 22 / 0.5 = 44.
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