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There are 2 bags, each can hold 50 balls; there are 50 black balls and 50 red balls. A bag is selected at random, and a ball is taken out from it. What is the maximum and minimum probability that the ball being taken out is red.
 one year ago
 one year ago
There are 2 bags, each can hold 50 balls; there are 50 black balls and 50 red balls. A bag is selected at random, and a ball is taken out from it. What is the maximum and minimum probability that the ball being taken out is red.
 one year ago
 one year ago

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shubhamsrgBest ResponseYou've already chosen the best response.0
let 1st bag have x red balls, then it has 50x black balls also, 2nd bag then has 50x red balls and x black balls if x=0 or 50, then our probability is maximum and minimum i.e. 0 and 1 ..
 one year ago

hartnnBest ResponseYou've already chosen the best response.2
sure ? where did u account for the probability of selecting a bag randomly. ?
 one year ago

shubhamsrgBest ResponseYou've already chosen the best response.0
hmm,,i assumed 1 bag has already been taken..
 one year ago

hartnnBest ResponseYou've already chosen the best response.2
nopes, its either 1/2,0 or 1/2,1/2
 one year ago

hartnnBest ResponseYou've already chosen the best response.2
i wanna know, which one, for sure....
 one year ago

shubhamsrgBest ResponseYou've already chosen the best response.0
after we select the bag, do we know how many balls are in there ?
 one year ago

shubhamsrgBest ResponseYou've already chosen the best response.0
i mean how many red balls*
 one year ago

hartnnBest ResponseYou've already chosen the best response.2
do we know? NO, can we find for max and min probab ?YES
 one year ago

hartnnBest ResponseYou've already chosen the best response.2
and i want to know the concept of what is min and max probability
 one year ago

shubhamsrgBest ResponseYou've already chosen the best response.0
then net probability i guess would be (1/2 * x/50) + (1/2 * (50x /50) ans i guess is half? o.O missed something maybe ..
 one year ago

hartnnBest ResponseYou've already chosen the best response.2
u getting 1/2,1/2 right ?
 one year ago

hartnnBest ResponseYou've already chosen the best response.2
i was getting 1/2,0 some of my friends were also telling 1/2,1/2 so i got confused
 one year ago

sauravshakyaBest ResponseYou've already chosen the best response.0
Even I heard it first time....... what is max and min probability.
 one year ago

hartnnBest ResponseYou've already chosen the best response.2
i think max probab means a case in which the probab of selecting a red ball is max. it will be when we select a bag with all red balls in it....so 1/2
 one year ago

ShadowysBest ResponseYou've already chosen the best response.0
1 bags out of two. 1/2. The minimum probability you have said is quite a strange notion...if I don't choose at all, then it is 0.
 one year ago

ZekariasBest ResponseYou've already chosen the best response.1
I agree with the above This is b/c we get the maximum probability when one bag is filled with 50  black balls and the other with 50 red balls. Here the probability of selecting the bag with 50  red balls is 1/2, and then the probability of selecting a red ball from this bag is 1. Thus the maximum probability will be 1/2* 1 = 1/2. Again we get the minimum probability when one bag is filled with 50  black balls and the other with 50 red balls, so that the probability of selecting the bag with 50  black balls is 1/2. And from this bag the probability of selecting red ball is 0. Thus the minimum probability is 1/2 * 0 = 0. Thus @hartnn u are correct since I get 1/2, 0.
 one year ago

hartnnBest ResponseYou've already chosen the best response.2
so there is no different concept like man or min probability...?
 one year ago

waterineyesBest ResponseYou've already chosen the best response.0
Amazing....!!!!! Isn't it??
 one year ago

waterineyesBest ResponseYou've already chosen the best response.0
Even @hartnn has question today.. Ha ha ha ha...
 one year ago

hartnnBest ResponseYou've already chosen the best response.2
lol! i am human, can't i have questions ? :P
 one year ago

waterineyesBest ResponseYou've already chosen the best response.0
No.... Ha ha ha ha..
 one year ago
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