sum of two discount rates

[blover]

detailed explaination required ?

[rite237]

let x and y be the discount on each of the fox and pony jeans. From 1st statement we get:

15*3*x + 18*2*y = 9

from 2nd condition we get:

x + y = 0.22

solving both we get y = 0.1 hence 10%

B is correct

[vinhan]

let discount on Fox Jeans be x%
discount on Pony = (22-x)%

Total cost of 5 pairs = $ 72.

(45*(100-x)/100) + (36*(78+x)/100) = 72
(using Sale price = Marked Price * (100-discount%)/100 )
solving we get discount on pony = 10%