1. Of a group of people surveyed in a political poll, 60% said that they would vote for candidate R. Of those who said that they would vote for R, 90% actually voted for R, and of those who did not say that they would vote for R, 5% actually voted for R. What percent of the group voted for R?
2. According to a geneticist at Stanford University, the chances of having a left-handed child are 4 in 10 if both parents are left-handed, 2 in 10 if one parent is left-handed, and only 1 in 10 if neither parent is left-handed. Suppose that a left-handed child is chosen at random from a population in which 25% of the adults are left-handed. What is the probability that the child's parents are both left-handed?