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Please help...sets with 5 variables
by mansi goel - Saturday, 1 September 2012, 03:29 PM
 
in a class , the number of students who scored more than 90% in various subjects is given below -
english - 12; physics -16; chemistry -15; maths- 22; biology- 18
total students= 30
ques: the number of students who scored more than 90% in at most 2 subjects is at most-
19,21,22,26,30?

please give me the logic to solve such problems..

Re: Please help...sets with 5 variables
by vinny s - Saturday, 1 September 2012, 08:42 PM
  is the answer 22???????????????
Re: Please help...sets with 5 variables
by mansi goel - Sunday, 2 September 2012, 03:57 AM
  yes...please give your approach...