Color blindness About 8% of males are color-blind. A researcher needs some color-blind subjects for an experiment and begins checking potential subjects.

1. On average, how many men should the researcher expect to check to find one who is color-blind?

2. What’s the probability that she won’t find anyone color-blind among the first 4 men she checks?

3. What’s the probability that the first color-blind man found will be the sixth person checked?

4. What’s the probability that she finds someone who is color-blind before checking the 10th man?