You select a marble without looking and then put it back. If you do this 33 times, what is the best prediction possible for the number of times you will pick a brown marble?

Question

anonymous · Answer

attachment

anonymous · Answer

it has to be like a whole number....no fractions

anonymous · Answer

The marbels are in the above pic

pokemon23 · Answer

Sorry but my math level skill aren't high enough to help you -_-

anonymous · Answer

probability theorm

phi · Answer

There are 11 marbles, 4 of them are brown.
The probability you will pick a brown marble is 4/11
The expected number of brown marbles is the probability of getting one on each pick times the number of picks.

It is the same idea as this.  Say you had a 1/2 chance of picking red or blue marbles.  After 100 picks, you would expect to get 1/2 red and 1/2 blue (on average), or 50 of each.

Here you expect to get 4/11 * 33 = 12 brown marbles

anonymous · Answer

what phi said

anonymous · Answer

probability of getting a brown, times the number of trials.