Question

A florist bought 360 roses at $10 per dozen if he sold them at $ 1.10 each ehat is his profit as a persentage of the selling price

Answer 1

C.P = 10/12 = 0.83$ 
S. P = 1.10$
Total C.P of 360 roses = 360*0.83 = 298.8$
Total S.P of 360 roses = 396 $
Finding profit = S.P-C.P = 97.2$

Profit percent = Finding Profit * 100 /C.P = 97.2 *100 / 298.8  = 32.53 %

He made a profit of 32.53% 

Answer 2

The florist made a profit of 32% in this deal.

Cost price of 1 dozen (12) roses = $10

∴ C.P. of 12 roses = $ 10

So, by unitary method, C.P. of 1 rose = $(10/12)

∴ C.P of 360 roses = $ (10/12) × 360 = $ 300

Given that Selling Price of 1 rose = $1.10

∴ S.P. of 360 roses = $ (1.10 × 360) = $ 396

Since S.P .>C.P., the florist gains profit.

Profit value = S.P. - C.P.

= $(396-300) = $96

Profit% = [(Profit value/CP) × 100]%

= [96/300] × 100%

= 32%