There are two small boxes A and B In A there are 9 white beads and 8 black beads In B there are 7 white and 8 black beads We want to take a bead from a box a What is the probability of getting a white bead from each box b A white bead and a black bead are added to box B an then a bead is taken from it What is probability of getting a white bead from it

Answers

Question :

There are two small boxes A and B . In A there are 9 white beads and 8 black beads. In B there are 7 white and 8 black beads. We want to take a bead from a box. (a) What is the probability of getting a white bead from each box? (b) A white bead and a black bead are added to box B an then a bead is taken from it. What is probability of getting a white bead from it.
Submitted on 4/2/2024 | Answered by Vandana Rana

Answer :

Total number of beads in box A
=9W+8B = 17

Total number of beads in box
B =7W +8B= 15


 (a) P(getting a white bead from box A) =
 9/17

 P(getting a white bead from box B) =
 7/15

 
 (b) When a white bead and a black bead are added to box B,

 Number of white beads in box
 B = 7W+1W

 =8W

 
 Number of black beads in box  B
 =8B +1B

 = 9B

 
 Thus, total number of beads in box
 B =8W +9B

 = 17

 
 Hence, P(getting a white bead from box B) = 8/17