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1. You are given the following formula for the probability of a 20-year-old surviving at least n more years: n p 20 = 0.80 0.01
1. You are given the following formula for the probability of a 20-year-old surviving at least n more years:
n p20 = 0.80 0.01n.
What is the probability (40) will survive to at least age 65?
- A. 35.0%
- B. 58.3%
- C. 55.0%
- D. 63.6%
2. Let E1, E2, E3 and E4 be events with the following probabilities: P(E1) = 1/4, P(E2) = 2/5, P(E3) = 1/6, P(E4) = 1/5.
E1 and E2 are mutually exclusive events, while E3 and E4 are independent events.
Let,
A = probability of neither E1 nor E2 occurring
B = probability of exactly one of E3 or E4 occurring.
What are the values of A and B?
- A. A = 0.35, B = 0.300
- B. A = 0.15, B = 0.148
- C. A = 0.10, B = 0.300
- D. A = 0.35, B = 0.150
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