Answer to riddle 68.
Marble jars riddle.
1 2 chance we pick jar a 50 50 chance we pick a red marble 1 2 chance we pick jar b 0 50 chance we pick a red marble.
The king placed 2 marbles in a jar that was glued to a table.
And the probability of picking a red marble from any jar is the number of red marbles in the jar over the total number of marbles in the jar.
Riddles good riddles hard riddles iq riddles logic riddles previous riddle i have one you have one.
He gives you 50 black marbles 50 white marbles and 2 empty bowls and instructs you to divide the 100 marbles into the two bowls.
If the first marble you pulled out from the box labeled both is a white marble then you solve the problem in the same general way.
One of the marbles was supposed to be black and one was supposed to be blue.
The emperor offers you a chance to live by playing a simple game.
You would still end up with a chance of 50.
You don t know which is which.
Put one red marble in one jar a and the remainder in the other jar b.
Seems tricky at first right.
Given that the number of red and blue marbles are the same you would tend to think that the odds are 50 50.
The remaining marble is slightly heavier than the others.
Yeah i probably shouldn t have even bothered with the picture.
A king decided to let a prisoner try to escape the prison with his life.
Let p blue probability of picking a blue marble.
With a 50 chance of selecting jar a and a 50 chance of selecting jar b the odds become 50 50 49 99 74 7474 or 148 198.
You would try different combinations such as 25 of each colored marble in a jar or putting all red marbles in one jar and all the blue in the other.
You are a prisoner sentenced to death.
3 you are allowed to use set the scale twice in total.
Jar 1 contains 1 blue marble and jar 2 contains 99 blue marbles and 100 red marbles.
You can divide them however you want as long as all the marbles are in the bowls.
Next riddle middle of nowhere.
You have 50 red marbles and 50 blue marbles other wise identical.
If we select jar a then getting a red marble is guaranteed but it will also be guaranteed if there is only one red marble in that jar then also the probability of getting a red marble from jar a is 1 1 1.
So now we can place remaining 49 red marbles in jar b so it increases the prob of getting red marbles in jar b.
If jar b is selected you have 49 99 chance of selecting a red marble.
In any case on to the riddle.
1 you have 9 marbles as seen.
You would try different combinations such as 25 of each colored marble in a jar or putting all red marbles in one jar and all the blue in the other.
If jar a is selected you have 100 chance of selecting a red marble.
Put one blue marble in one jar and put the rest of the marbles in the other jar.
Arrangements of red blue marbles.
