What is abc

Stress at work: In a poll conducted by the General Social Survey, 81% of respondents said that their jobs were sometimes of! always stressful. Two hundred workers are chosen at random. Use the TI-84 Plus calculator as needed. Round your answer to at least four decimal places. (a) Approximate the probability that 150 or fewer workers find their jobs stressful. (b) Approximate the probability that more than 160 workers find their jobs stressful. (c) Approximate the probability that the number of workers who find their jobs stressful is between 147 and 157 inclusive