Verified Answer :

The answer for that question is 1/5 because 2+3+5=10 then you simplify 2/10 to 1/5

If your bag contains 10 marbles (3white + 2black + 5 red) and you want pick a black, the probability is two on ten, or

\(\dfrac{2}{10}\,\,\text{simplifying}\,\, \dfrac{1}{5}.\)