Question

In a bag of oranges, the ratio of the good ones to the bad ones is 5:4. If the number of bad ones in the bag is 36, how many oranges are there altogether?

Answer 1

5x - good ones

4x - bad ones

$4x=36\\ x=9\\\\ 5x=5\cdot9=45\\\\ 45+36=81$

81