Question 433457
 A test is given with 10 T-F questions. How many different ways can the answer sheet be filled out so that 8 or more questions are answered correctly? I am drawing a blank and do not know where to start?
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Binomial Problem with n = 8 and p = 1/2
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P(8<= x <=10) = 1-P(0<= x <=7) 
= 1 - binomcdf(8,0.5,7) 
= 0.0039
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Cheers,
Stan H.