Questions 1:

a) Students in a preschool are assigned special jobs, like door helper, line leader, and calendar helper. There are 21 students in the class and 5 special jobs to be assigned. The teacher has each student's name written on a card and draws names from a hat to select student helpers. Mary really hopes to be selected for a special job. What is the probability that Mary is selected? (Enter your probability as a fraction.)

b) In a recent survey of 100 motorcyclists, it was determined that 42 of the bikers had body art, such as tattoos and piercings, and 58 of them did not.Calculate the probability. (Enter your probability as a fraction.)If a motorcyclist is to be picked randomly from this group of bikers, the probability that he or she has body art is.

c) It is believed that 3% of a clinic's patients have cancer. A particular blood test to determine if a person has cancer was given to 75 patients. The test was positive for 2 of them. (Enter your probability as a fraction.)The probability that the patient tested positive is

d) Young people often find that playing video games, watching TV, and instant messaging friends can be very relaxing, and can help to alleviate stress in their lives. Apparently, though, it isn't relaxing enough. In a survey of teens at a local high school in Oregon, 49% of them said they need a vacation.Calculate the probability.The probability that a student in this survey says something other than that he or she needs a vacation is