February 28, 2017

Homework Help: Math:Probability

Posted by Anonymous on Friday, February 28, 2014 at 7:44pm.

The probability of having homework over the weekend in math is 0.9,history is 0.6, and Spanish is 0.75.
1. What is the probability of having exactly one class that gives homework?
Is this a nCx problem?
I got an illogical answer: 10.54=1054% THIS IS NOT RIGHT!!!!!!!
2. What is the probability of having homework in at least 1 class?
My answer : 0.492

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