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 The probability of becoming pregnant if you used 3 different methods. The first is 87% that you won't get pregnant, the second is 95% sure y

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The probability of becoming pregnant if you used 3 different methods. The first is 87% that you won't get pregnant, the second is 95% sure you won't get pregnant. And the third is 99% that you won't get pregnant. What is the probablility of becoming pregnant?

 May 19, 2015

Best Answer 

 #1
avatar+118723 
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It is the probability that they all fail.

 

$${\mathtt{0.13}}{\mathtt{\,\times\,}}{\mathtt{0.05}}{\mathtt{\,\times\,}}{\mathtt{0.01}} = {\mathtt{0.000\: \!065}}$$

 

$${\frac{{\mathtt{65}}}{{\mathtt{1\,000\,000}}}}$$

 May 19, 2015

1+0 Answers

 #1
avatar+118723 
+10
Best Answer

 

It is the probability that they all fail.

 

$${\mathtt{0.13}}{\mathtt{\,\times\,}}{\mathtt{0.05}}{\mathtt{\,\times\,}}{\mathtt{0.01}} = {\mathtt{0.000\: \!065}}$$

 

$${\frac{{\mathtt{65}}}{{\mathtt{1\,000\,000}}}}$$

Melody May 19, 2015

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