Well it rhymed..
Materials: 2 Jars 100 marbles, 50 red,50 blue

You need to place all the marbles into the jars. You can place them however you want. All the marbles must be in a jar. You want to maximize the chances that when you pick 1 random marble out a one of the randomly selected jars it will be red.

Example
You put 25 red marbles in Jar A with 25 blue ones.
You put 25 red marbles in Jar B with 25 blue ones.

You have a .5 chance of selecting Jar A and then a .5 chance of selecting a red marble. = .25
You ahve a .5 chance of selecting Jar B and then .5 chance of selecting a red marble. = .25

.25+.25 = .5

__________________
“There's no sense in being precise when you don't even know what you're talking about.” - John von Neumann

in one jar you put only 1 red marble, in the other put all the remaining marbles.

Yea thats right. Next time, put it in white so others still have a shot at it.

__________________
“There's no sense in being precise when you don't even know what you're talking about.” - John von Neumann

can someone show the work?

Jar A 50 blue 49 red
50% Jar A @ 49.49494949% = .247

Jar B 1 red
50% jar B @ 100% = .5

.5 + .247 = .747

at best you have a 3 in 4 shot at picking red

__________________
IIAv8tionII - ME
Av8tion - SCAMMER

Online Tournament Wins: 11