There are 10 prizes in high school mathematics, two of which are prizes, and three people, Party A, Party B and Party C, draw one in order to seek the probability that Party B will win the prize. (2)

There are 10 prizes in high school mathematics, two of which are prizes, and three people, Party A, Party B and Party C, draw one in order to seek the probability that Party B will win the prize. (2) Party A didn't win the prize. The winning probability of B is 8/10× 2/9+2/10×1/9 = 0.2.

The probability that A will not win the prize is 8/ 10=0.8.

(the winning probability of c is 0.8 * 0.8 * 2/8+0.2 * 0.8 *1/8 * c (21) = 0.2).

The probability that at least one of B and C will win the prize is 1-0.8*0.8=0.36.

The probability that only one of the three people will win the prize is 0.2 * 0.8 * 0.8 * c(3 1)= 0.384.