3 out of 5 picks are orange. If 12 picks are orange, has many picks are there in all.

If 3 out of 5 are oranges, this means the ratio is 3 oranges for every 5 total.

If there are 12 oranges, this is 4 groups of 3 oranges.  You will need 4 groups of 5 total to make it equivalent.

4 x 5 = 20 total fruit.

3 x 4 =  12
5 x 4     20