Section 15.1

Exercise Set A: 1, 2, 3, 4, 5, 6

Also:

1. Suppose a fair dice is rolled 600 times. Find the probability of rolling
   1. exactly 100 sixes,
   2. 100 or fewer sixes,
   3. 100 or more sixes.
2. Suppose the probability that a certain type of light bulb will last more than 1000 hours is 0.3679. Suppose 100 such light bulbs are tested. Find the probability that
   1. exactly 50 light bulbs last more than 1000 hours,
   2. 50 or fewer light bulbs last more than 1000 hours,
   3. 50 or more light bulbs last more than 1000 hours.

Answers:

1. a. 0.04366 b. 0.5267 c. 0.5170

2. a. 0.002136 b. 0.9974 c. 0.004714