There are two bags A and B. Bag A has 12 red balls and 10 blue balls and bag B has 20 red balls and 15 blue balls. If the probability of choosing bag A is
.75 and the probability of choosing bag B is 0.25 then what is the probability of choosing a red ball from bag A.

how to solve this???

• ans is 0.40
  the probability of getting bag A =0.75
  but getting red ball from bag A,there are 12 red balls in A selecting 1 from 12=12c1
  total there are 22 balls in bag A selecting 1 ball from bag A is 22c1=22
  so probalitity of selecting bag A*propability of selecting red ball from bag A
  0.75*12/22
  =0.40
• 11 years agoHelpfull: Yes(7) No(2)
• Answer is .41. First calculate probability of selecting a red ball from bag A which is 12/22. Then multiply it by .75. That will give you the result.
• 11 years agoHelpfull: Yes(3) No(1)
• 0.75(12c1)/((0.75)22c1 +(0.25)35c1) this illustrates the answer.
  
• 11 years agoHelpfull: Yes(1) No(0)