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A teacher has made ten statements for a True-False test. Four statements are true and six are false. How many distinct answer keys could there be for the test?

 

just hints please, thanks!

 Apr 24, 2019
 #1
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Formula for picking items from n set: \(\frac{n!}{r!(n-r)!}\)

 

Since you are trying to find the combinations for a ten question test with 4 true and 6 false, you can just think it as picking 4 items from a set of 10 or picking 6 items from a set of 10.

 

Note: There are the same amount of combinations picking 4 items from a set of 10 is the same thing as picking 6 items from a set of 10

 

 

Now use the formula.

 Apr 24, 2019
edited by CalculatorUser  Apr 24, 2019

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