Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa

The average of marks obtained by 120 candidates was 35. If the average of the passed candidates was 39 and that of the failed candidates was 15, then the number of those candidates, who passed the examination, was

  • Option 1)

    100

  • Option 2)

    110

  • Option 3)

    130

  • Option 4)

    150

  • Option 5)

    120

Answers (1)

best_answer

Avg. \: Of\: marks = 35
sum \: of \: marks = 35*120 = 4200
let \: the\: no. \: of \: passed\: candidates = x
no. \, of\: failed = y
x+y= 120 --------(i)
39x+15y=4200 -----(ii)
multiply\: (i) by \: 15 \: and \: then \: solving (i) & (ii)
-24x = -2400
x = 100

Posted by

rishi.raj

View full answer

Similar Questions

Latest Question