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#1




calculate probability
Assume that any single single laboratory test in a 3 test battery obtained from healthy volunaers having 5% chance of falling outside the normal range.Which of the following is closest probability that healthy volunteer has same result on all test????
5 40 85 95 100 
#2




Quote:
which is 95%x95%x95% = 85% 
#3




How did you do that?can you explain please

#4




In this question, the test results are independent events
(i.e. the result of one test tells you nothing about the other 2 results) and the rule is we combine probabilities for independent events by multiplication. The chance of "having the first test normal" equals 95%, which also equals the chance of having the second test normal as well as the third. So the chance for having them all normal = the chance of having the first one normal x the chance of having the second one normal x the chance of having the third one normal. 
The above post was thanked by:  
arvine_14 (02122014) 
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