Final answer:
The question asked requires additional information about the number of men and heavy smokers within the group to calculate the probability. The correct approach would be to use the addition rule of probability, but without specific figures, we can only conclude there is 'not enough information' to answer the question.
Step-by-step explanation:
Understanding Probability
When considering the probability that a randomly selected individual from a group of 1,156 people is a man or a heavy smoker, we need more information to provide a precise answer. Typically, this calculation would be based on the addition rule of probability, which states that the probability of either of two mutually exclusive events occurring is the sum of their individual probabilities minus the probability of both events occurring together (if they are not mutually exclusive).
Without specific numbers provided for the number of men and the number of heavy smokers within the group, as well as the number that may be both, we cannot accurately calculate the probability. If these figures were available, we would apply the formula:
P(Man or Heavy Smoker) = P(Man) + P(Heavy Smoker) - P(Man and Heavy Smoker)
Consequently, if the only information we have is that there are 1,156 people in total, we must reply with 'not enough information' to solve the problem presented.