SOLUTION: According to a study conducted in 2003 concerning the participation, by age, of 401(k) investors, the following data were obtained: Age 20s 30s 40s 50s 60s Pe

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Question 928168: According to a study conducted in 2003 concerning the participation, by age, of 401(k) investors, the following data were obtained:
Age 20s 30s 40s 50s 60s
Percent 11 28 30 25 6
(a) What is the probability that a 401(k) investor selected at random was in his or her 20s or 60s?

(b) What is the probability that a 401(k) investor selected at random was under the age of 50?

Answer by 428225(90) About Me  (Show Source):
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Part a)
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P(20s) = 11%
P(60s) = 6%
11+6= 17%
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Part b)
100% - P(50s) - P(60s)
=100-25-6
=69%