Question

The costs of Brand A and Brand B coffee beans are $400/kg and

$280/kg respectively. x kg of Brand A coffee beans and y kg of
Brand B coffee beans are mixed so that the cost of the mixture is
$320/kg. Find the ratio of x:y.
​

Answer 1

The ratio of x:y is 1/2

Explanation:

Let

x----> the number of Kg of brand A

y ---> the number of Kg of brand B

we know that

400x+280y=320(x+y)

400x+280y=320x+320y

400x-320x=320y-280y

80x=40y

x/y=40/80

x/y=1/2