9) In a country, the probability of a letter posted by Pos Laju' will reach its destination within 24 hours is 0.2. Assume that 200 letters are posted by Pos Laju'. By using normal approximation find the probability that more than 50 letters reach its destination within 24 hours.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section: Chapter Questions
Problem 27T
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NORMAL DISTRIBUTION
9) In a country, the probability of a letter posted by Pos Laju' will reach its destination
within 24 hours is 0.2. Assume that 200 letters are posted by Ros Laju'. By using
normal approximation find the probability that more than 50 letters reach its
destination within 24 hours.
10) A fair coin is toss 100 times. By using normal approximation, find the probability that
less than 35 head are obtained.
Transcribed Image Text:NORMAL DISTRIBUTION 9) In a country, the probability of a letter posted by Pos Laju' will reach its destination within 24 hours is 0.2. Assume that 200 letters are posted by Ros Laju'. By using normal approximation find the probability that more than 50 letters reach its destination within 24 hours. 10) A fair coin is toss 100 times. By using normal approximation, find the probability that less than 35 head are obtained.
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