【Probability Theory】Independent homework (1)

fill in the blank

1. The probabilities of a person's blood types being A, B, AB, and O are 0.37, 0.21, 0.08, and 0.34 respectively. Now select four people at random, and try to find: (1) The
   probability that the blood types of these four people are all different =_____; (Reserve 4 digits after the decimal point) [Correct answer: 0.0507]
   (2) The probability that the blood types of these four people are all the same =_____; (Reserve 4 digits after the decimal point) [Correct answer: 0.0341]
   Solution:
   (1) Find The probability is P ( A 1 ) = 4 ! × 0.37 ×