Question

A box has 10 red balls and 5 black balls. a ball is selected from the box. if the ball is red, it is returned to the box. if the ball is black, it and 2 additional balls are added to the box. find the probability that a second ball from the box is: (a) red (b) black

Answer 1

number of red balls 10/17. number of black balls 7/ 17

Answer 2

Answer:

box has 10 red balls and 5 black balls. a ball is selected from the box. if the ball is red, it is returned to the box. if the ball is black, it and 2 additional balls are added to the box. find the probability that a second ball from the box is: (a) red (b) black