Find the probability that exactly 6 ask for water with their meal. at least 2 ask for water with their meal. second random sample of 50 customers is selected. Fi

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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In a large restaurant, an average of 2 out of every 5 customers ask for water with their
meal. A random sample of 10 customers is selected.
a)
Find the probability that
(i)
exactly 6 ask for water with their meal.
(ii)
at least 2 ask for water with their meal.
b)
A second random sample of 50 customers is selected. Find the value of n such
that P(X <n) = 0.9022 where the random variable X represents the number
of these customers who ask for water.
Transcribed Image Text:3 In a large restaurant, an average of 2 out of every 5 customers ask for water with their meal. A random sample of 10 customers is selected. a) Find the probability that (i) exactly 6 ask for water with their meal. (ii) at least 2 ask for water with their meal. b) A second random sample of 50 customers is selected. Find the value of n such that P(X <n) = 0.9022 where the random variable X represents the number of these customers who ask for water.
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