Question 253265
Notation: P(Red) denotes the probability of selecting a red ball



First, add up the number of balls to get a total of 3+4+5=12 balls total.



P(Red) = Number of Red Balls/Number of Balls Total = 3/12 = 1/4



So the probability of selecting a red ball is 1/4 which is 0.25 in decimal form giving us a 25% chance.