Each of ten items was cost C dollars. If 8 items were sold out at price of D (d>c) and 2 items were sold out at price of 1.1C, what is the ratio of profit to cost?
1).d=c+8
2).d=1.2c
1).d=c+8
2).d=1.2c
Cost per item =C/10 and sale per item=D/8
Sale=D+1.1C Cost=C. profit=D+1.1C-C
Ratio= D+1.1C-C/C.
We have to know either D in terms of C or C in terms of D.
St.(1) We cannot find the ratio. Not sufficient.
St.(2) We can find the ratio.Sufficient.
Ans. B
