1. A prototype lot for a newly designed suspension spring underwent testing with the following results: Total hours accumulated: 12,000 Number of Failures: 6 Hours to failure: 202, 387, 461, 590, 723, 864 What is the failure rate?
a. 0.0005 / hour
b. 0.0024 / hour
c. 0.0018 / hour
d. 0.0020 / hour
2. The Tennessee state lottery draws six numbers from 1 to 50. No number is repeated. How many unique combinations are possible?
a. 9.872 x 109
b. 1.144 x 1010
c. 1.589 x 107
d. 2.118 x 106