A seller uses 840 gm in place of 1 kg to sell his goods. Find his actual profit/loss % When he sells his article on 4% loss on cost price ?

Options

A. a. 14.28 % profit
B. b. 24.18 % profit
C. c. 14.28 % loss
D. d. 24.18 % loss

Explanation

Total sutdents =2000
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 and C both =a/2
Number of students appeared in all three exams
`=(4)/(100)xx2000=80`
Number of students appeared in B exam only = No. of Students 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 appeard in two exam only
`=160+120+240=520`