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09 Hw2 - Bayes

# 09 Hw2 - Bayes - Functional Widgets Box 1 Box 2 Box 3 Box 4...

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1/5/10 Question 7 We have 4 boxes with functional and defective widgets. We select a box i at random, with P (Bi)=1/4 and select a widget from it. What is the probability that the widget is defective P(D)? Functional Widgets Defective Widgets Box 1 1900 100 Box 2 300 200 Box 3 900 100 Box 4 900 100

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1/5/10 Homework 2 Question 9 How many distinct permutations can be made from the letters in the words? a) industrial b) engineering
1/5/10 Multiplication Rule Useful in determining the intersection of sets. ) ( ) | ( ) ( ) | ( ) ( A P A B P B P B A P B A P = = An urn contains 8 red balls and 4 white balls. We draw 2 balls without replacement. Assume at each draw, each ball has equal probability of being chosen. What is the probability that both balls drawn are red?

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1/5/10 Homework 2 Question 12 An urn contains 3 blue balls and 2 red balls. I randomly pick 2 balls without replacement. All balls have the same probability. a) What is the probability that first ball is blue and the second ball is red?
1/5/10 Bayes Theorem Bayes Theorem

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09 Hw2 - Bayes - Functional Widgets Box 1 Box 2 Box 3 Box 4...

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