The American Red Cross says that about 45% of Caucasians in the U.S. have Type O blood, 40% Type A, 11% Type B, and 4% Type AB. Find the answers to problems A and B. a.)  What is the probability that the next blood donor who enters a donation center has Type O or Type A blood? Round to two decimal places.  b.)  What is the probability that the next three blood donors all have Type O blood? Round to four decimal places

1) According to a recent poll about 60% of vaccinated Americans say they still wear a mask in public indoor settings.  In a group of 5 vaccinated Americans: a-The probability that exactly 4 wear a mask is ..... what %. b-The probability that at least 4 wear a mask is  ..... what  %. c-The probability that fewer than 4 wear a mask is  ..... what  %.

The chart below summarizes data related to the number of cars stopped for speeding on Route 195. The chart shows whether the driver being stopped was a teenager or older, and whether the result of the stop was a ticket, written warning, or verbal warning. a) For a randomly selected traffic stop, what is the probability that the result of the stop was a ticket? b) For a randomly selected traffic stop, what is the probability that the driver was a teenager and given a written warning? c) For a randomly selected traffic stop, what is the probability that the car stopped was given a ticket or the driver was 20 or older?

A sample of 420 students from Pasadena City College were asked which subject/class was your favorite in high school NOTE: Provide and use formulas to solve this questions English Math History Total Female 110 50 65 225 Male 30 120 45 195 Total 140 170 110 420 1) What is the probability that a person selected will choose English given that the person is male? 2) The selected person chooses History, what is the probability that the person is female? 3) What is the probability of selecting someone who chooses Maths as their favorite subject/class OR is male? 4) What is the probability of selecting someone who chooses to history as their favorite subject?