A magnetic tape storing information in binary form has been corrupted, so it can only be readwith bit errors. The probability th
at you correctly detect a 0 is 0.9, while the probability thatyou correctly detect a 1 is 0.85. Each digit is a 1 or a 0 with equal probability. Given that youread a 0, what is the probability that this is a correct reading?
What are factors of -40? (-20)(2) (-10)(4) (sum of these factors is 6, which is not what we wanted) (-5)(8) = -40 and the sum of the factors (-5) and (8) is 3.
{-5, 8} is the list of factors of -40 that add up to 3.
