Question: Still more lefties. Suppose we choose 12 people instead of the 5 chosen in Exercise.
a) Find the mean and standard deviation of the number of right-handers in the group.
b) What's the probability that
i) they're not all right-handed?
ii) there are no more than 10 righties?
iii) there are exactly 6 of each?
iv) the majority is right-handed?
Exercise: Lefties. Assume that 13% of people are left-handed. If we select 5 people at random, find the probability of each outcome described below.
a) The first lefty is the fifth person chosen.
b) There are some lefties among the 5 people.
c) The first lefty is the second or third person.
d) There are exactly 3 lefties in the group.
e) There are at least 3 lefties in the group.
f) There are no more than 3 lefties in the group.