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1. A sample of 40 petroleum industry executives was selected to ll out a questionnaire. One question on environmental issues requires them to answer yes or no. a. What is the experiment? b. mention one possible event. c. Ten of the 40 executives said yes. Based on the sample's answer, what is the probability of a petroleum industry executive answering yes? d. What concept of probability is illustrated in this case? e. Does each result have the same opportunity and not be tied to each other? 2. A company has 4 photocopiers. The random variable X presents the number of photocopiers used simultaneously at one time. If known P(X=0) = 0.08, P(X=1)=0.11, P(X=2)=0.27 and P(X=3)=0.33. His P(X=4) 3. A company receives 60% of orders via the internet. If in one order there are 18 different locations, calculate the probability: a. Between 8 and 10 orders received b. No more than 4 orders received c. [At most 16 orders received