WishMasterUA wrote:

During a one day sale, a store sold each sweater of a certain type for 30$ more than the store's cost to purchase each sweater. How many of these sweaters were sold during the sale?

1) During the sale, total revenue from of these sweaters was 270$.

2) During the sale, the store sold each of these sweaters at a price that was 50% greater tan the store's cost to purchase each sweater.

S = selling price

C = cost price

\Question tells us S= C+30

st 1 = Selling price * no of sweaters = 270.............. insufficient

st 2 = S = 1.5C

using information from question

1.5 C = C+30

0.5C = 30

C = 60

S =90

but no clue on revenue or number of sweaters sold. ............. insufficient

together 90* no of sweaters = 270

no of sweater = 3

sufficient

hence C