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Statistics

Notes 5. A large office has three Xerox machines M , M and M . The probability that on a given day
1 2 3
M works is 0.60
1
M works is 0.75
2
M works is 0.80
3
both M and M work is 0.50
1 2
both M and M work is 0.40
1 3
both M and M work is 0.70
2 3
all of them work is 0.25.
Find the probability that on a given day at least one of the three machines works.

Answers: Self Assessment

1. (b) 2. (a) 3. (a) 4. (a) 5. (b)

2.7 Further Readings

Books Introductory Probability and Statistical Applications by P.L. Meyer
Introduction to Mathematical Statistics by Hogg and Craig
Fundamentals of Mathematical Statistics by S.C. Gupta and V.K. Kapoor

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