Probability › Drawing from bags › Colour ratios
First, fifteenth or last ball red
University · ●●○○○ 20 pts
A box contains 100 balls, of which 40 are red. The balls are drawn from the box one at a time at random, without replacement. Determine: 1. the probability that the first ball drawn is red, 2. the probability that the fifteenth ball drawn is red, 3. the probability that the last ball drawn is red. Give each answer as a decimal.