two types of flour X and Y cost sh.60 and 72 per kilogram respectively. they are mixed such that one kilogram of mixture costs sh.70. work out ratio in which they were mixed
60 x + 72 (1-x) = 70 (1)
- 12x = -2
x = 1/6 per kilo of x 5/6 per kilo of y
ratio x:y = 1:5