Page 84 - Probability Demystified
P. 84
CHAPTER 4 The Multiplication Rules 73
10. If two people are selected at random from the phone book of a large
city, find the probability that they were both born on a Sunday.
1
a.
7
1
b.
49
2
c.
365
2
d.
7
11. The numbers 1 to 12 are placed in a hat, and a number is selected.
What is the probability that the number is 4 given that it is known to
be an even number?
2
a.
3
3
b.
4
1
c.
6
1
d.
8
12. Three coins are tossed; what is the probability of getting 3 heads if it
is known that at least two heads were obtained?
1
a.
4
2
b.
3
1
c.
2
3
d.
8
