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An item is sold at a loss of 10%. Had it sold for Rs. 9 more, a profit of 25/2% would have gained. What is the cost price of the item? |
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Answer» A. 48 LET, students appear in exam C only =a Total students appeared in exam B=720 Ratio of number appeard in exam B and C only =`2:3` Students appeared in exam A andC both =a/2 Numberof students appeared in all three exams `=(4)/(100)xx2000=80` Number of students appeared in B exam only = No. ofStudents appeared in B and C only = 3x Number of students appeared in exam A and B only `=(2)/(3)xx3x=2x` Now, `2x+3x+3x+80=720` `RARR x=80` and, ` 12.5x +a+(a)/(2)=2000` `(5a)/(a)=1000` `rArr a=400` Students appeared in atmost two examsltbgt `=360+240+400+120+160+240+400+=1920` |
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