Suppose that a certain bank returns bad checks at a Poisson rate of three per day. What is the probability that this bank returns at most four bad checks during the next two days?
Suppose that a certain bank returns bad checks at a Poisson rate of three per day. What is the probability that this bank returns at most four bad checks during the next two days?
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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Suppose that a certain bank returns bad checks at a Poisson rate of three per day.
What is the probability that this bank returns at most four bad checks during the
next two days?
2=3₁2t=3(2)=6
i = 2
PCX ≤ 4) =
e² 2²
i !
P(X=0) + P(X=1) + P(X=2) + P(X= 3) + P(X=4)
=
= e 6°
o!
+
(
-66² +²6² +²²6²³² +0²6 64
-6.3
e
e
14
2!
3!
4!
24 ( 7 e 9+ (0 636) + (e ² 216) e-6 1296
+
24. 1
2.12
6.4
24
e-6 1296
168 € -6 126 6.432 4€ 6.864
24
+
24
24
24
= 1680-€ + 51840-6 34560² + 12960-²
24
24
+ 24
24
bloye
24"
Transcribed Image Text:7.
Suppose that a certain bank returns bad checks at a Poisson rate of three per day.
What is the probability that this bank returns at most four bad checks during the
next two days?
2=3₁2t=3(2)=6
i = 2
PCX ≤ 4) =
e² 2²
i !
P(X=0) + P(X=1) + P(X=2) + P(X= 3) + P(X=4)
=
= e 6°
o!
+
(
-66² +²6² +²²6²³² +0²6 64
-6.3
e
e
14
2!
3!
4!
24 ( 7 e 9+ (0 636) + (e ² 216) e-6 1296
+
24. 1
2.12
6.4
24
e-6 1296
168 € -6 126 6.432 4€ 6.864
24
+
24
24
24
= 1680-€ + 51840-6 34560² + 12960-²
24
24
+ 24
24
bloye
24
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