Let's understand this possibility with the help of an equation

Considering two items: fruit pulp and milk

Cost of fruit pulp = $ 5 per liter

Cost of milk = $ 4 per liter

if the cost of the mixture is 4.5 liter, just assume, we can find out their ratio.

assume ratio is a:b

So, forming the equation we get-

5a + 4b = 4.5 (a+b)

.5a=.5b

a=b

therefore, a:b = 1:1

Considering three items: fruit pulp, milk and ice

Here, cost of ice = $ 2 per liter

Cost of fruit shake = $ 3 per liter

If the ratio of fruit pulp, milk and ice is a:b:c

we form the equation as follows-

5a + 4b + 2c = 3 (a+b+c)

2a+b-c=0

In this equation there are three variables. So, in no way we can find ratio of a,b,c

Note:

To find values of n variables we need n equations

to find ratio of n variables we need (n-1) equations

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