In a post office, it is known that 4% of its parcels are mis-delivered each day. An agent is tracing random parcels delivered by this post office. On each day, the agent randomly traces 12 parcels. If at least 2 of them are mis-delivered, that day is marked “doomed”. (a) Find the probability that a randomly chosen day is “doomed”. (b) Find the probability that there are at most 2 “doomed” days in the next week.
In a post office, it is known that 4% of its parcels are mis-delivered each day. An agent is tracing random parcels delivered by this post office. On each day, the agent randomly traces 12 parcels. If at least 2 of them are mis-delivered, that day is marked “doomed”. (a) Find the probability that a randomly chosen day is “doomed”. (b) Find the probability that there are at most 2 “doomed” days in the next week.
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.8: Probabilities Of Disjoint And Overlapping Events
Problem 2C
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In a post office, it is known that 4% of its parcels are mis-delivered each day. An agent is tracing random parcels delivered by this post office.
On each day, the agent randomly traces 12 parcels. If at least 2 of them are mis-delivered, that day is marked “doomed”.
(a) Find the probability that a randomly chosen day is “doomed”.
(b) Find the probability that there are at most 2 “doomed” days in the next week.
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