If that is what it means, four or five, then yes that is correct.This problem has been taken from old paper of 'Master of Business Administration examination' of university in India. Problem goes as follows: A certain make of computer has a probability of 0.05 of giving wrong results owing to electrical or mechanical failure. To improve the accuracy of calculations the operator feeds the same data into five such statistically independent computers and accept as accurate the answer that majority of the computers give. For a calculation, what is the probability that a majority of the computers are operating properly?Answer: Majority of computers means more than 3. i-e 4 or 5 computers. So as per my calculations the probability that 4 or 5 computers are operating properly is 0.9774075.Is this answer correct? Let me know from this forum.Btw, correct answer is not available with me.