The juice stall at the circus stocked just 2 brands of orange juice tetra packs. Brand A costs $1 per pack and brand B costs $1.5 per pack. Last week , brand A contributed to x% of stall’s revenue and accounted for y% of sales of juice tetra packs. Which of the following expresses x in terms of y?	Choose the correct choice from the following answers:
A) 100y/(150 – y) B) 200y/(250-y) C) 200y/(300-y) D) 250y/(400-y) E) 300y/(500-y)
1. Let the number of units sold be 100. Then y units of A are sold and (100-y) units of B are sold.   Total revenue= Revenue due to A + Revenue due to B   = (No.of units of A sold * Cost/unit of A) + (No.of units of B sold * cost/unit of B)   = y *1 + (100-y) *1.5   = y + (150-1.5y) --- (1)   2. But we know, revenue due to A = x%. of the total revenue --- (2)   3. To express x in terms of y we need to relate (1) and (2)   4. x% = y / ( y + (150-1.5y))   or x= 100y / 150-0.5y = 200y/(300-y)   200y/(300-y)
<result>C</result>
The juice stall at the circus stocked just 2 brands of orange juice tetra packs. Brand A costs $1 per pack and brand B costs $1.5 per pack. Last week , brand A contributed to x% of stall’s revenue and accounted for y% of sales of juice tetra packs. Which of the following expresses x in terms of y?