Question 1A) A discrete random variable X has probability distribution given by X 1 2 3 4 5 P(X=x) 0.2 0.25 0.14 a 0.05 The value of “a” is.. a.0.45 b.0.64

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.2: Expected Value And Variance Of Continuous Random Variables
Problem 10E
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Question 1A) A discrete random variable has probability distribution given by

X

1

2

3

4

5

P(X=x)

0.2

0.25

0.14

a

0.05

The value of “a” is..

a.0.45
b.0.64
c.0.36
d.0.20
Question 1B
The run time for written C-Programmes for Gaussian elimination follows a normal distribution with a mean of 36 minutes and a standard deviation of 11 minutes. For a C-Programme chosen at random, the probability that the run time will be less than 51 minutes is ? 

a.0.9131

b.0.1586

c.0.0869
d.0.4131
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ISBN:
9780321964038
Author:
GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:
Pearson Addison Wesley,