While picking 30 apples six had worm holes what is the ratio

1:5

I am going to assume that you are asking for the ratio between apples and apples with worm holes! If that is not the case then I apologize. 

With these problems the goal is to find what the ratio they want is so in this case it is how many apples with worm holes are there to the number of apples. 

Here is another way to see it.

(A Form of Variance)/(Total)

The form of variance in this case is worm holes. 

6 Worm Holes
30 Apples

6/30

That above is a ratio, but we need to simplify it! 

Think what is 6*5? 
30.

Keep in mind we need to take out an equal number from both of them. 

6 will do.

6/30 = 1/5

1 Worm Hole/5 Apples

1:5

4should be the last one n=4