1 crates=8 apples
6 crates=?
=6*8
=48 apples
15 crates=15*8
=120
Now,
read carefully what question says,
(ratio, the number of apple in six crates ((to)) the total number of apples)
So,
=40/120
=4/12
=2/6
=1/3answer
so 1:3 is the answer
Am I correct?? let me know friend