In a jar of marbles, there are eight red five blue and three green marbles if a marble is randomly selected from the job what is the approximate probability of selecting a blue marble?

There are a total of 8 + 5 + 3 = 16 marbles in the jar.

The probability of selecting a blue marble is the number of blue marbles divided by the total number of marbles:

5 blue marbles / 16 total marbles ≈ 0.3125

Therefore, the approximate probability of selecting a blue marble is 0.3125 or 31.25%.