# Mov Probability Tree Diagrams Combining Probabilities - further examples

Sumit Jun 16, 2013 By:

**Reads:** 142

**Last modified:** 03 May 2013

Two examples for you to try, the first is relatively straight forward but Stuart would certainly encourage you to try the second.

1. In a factory, machines A and B produce electronic components. Machine A produces 40% of the components and machine B produces 60%. Some of the components are defective. Machine A produces 4% and machine B, 3% defective components. Find the probability that a randomly selected component is

(a) produced by machine B and is defective.

(b) defective

2. In a recent survey it was found that in a group of 60 girls and 40 boys, the probability of a person being left handed was 0.18. The probability of a girl being left handed is 0.1. What is the probability of a boy being right handed?

The Video is the part of the Module Tree diagrams and of the topic Probability by Stuart Sidders

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