The records of a travel agency indicate that 30% of the invoices they send are paid after the due date. If 20 invoices are sent, find the probability that: a) None is paid late. b) That exactly ten are paid on time. c) Maximum, half is paid late'

The records of a travel agency indicate that 30% of the invoices they send are paid after the due date. If 20 invoices are sent, find the probability that: a) None is paid late. b) That exactly ten are paid on time. c) Maximum, half is paid late'

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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The records of a travel agency indicate that 30% of the invoices they send are paid after the due date. If 20 invoices are sent, find the probability that:

a) None is paid late.
b) That exactly ten are paid on time.
c) Maximum, half is paid late'
d) What is the expected number of invoices that will be paid after they are due?
e) Justify the probability distribution model you used to answer the previous sections.

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