A bucket contains 5 yellow and 7 red balls. If 2 balls are selected randomly without replacement, what is the probability that they will both be yellow?

Question

anonymous · Answer

MEDAL IS REWARDED

cwrw238 · Answer

first withdrawal:   Probabilty of a yellow  =  5/12
that leaves 11 balls 
so what is the probability of another yellow being withdrawn?

anonymous · Answer

4/11

cwrw238 · Answer

right  
now for independent events  the probabilities are multiplied

so the required probability is

5/ 12  *  4/11

anonymous · Answer

=20/132

cwrw238 · Answer

right
or you can simplify it by dividing top and bottom by 4 to give

5/33

anonymous · Answer

Oh thanks...



Dint know its that EASY!

anonymous · Answer

Thanks I got it right on my assessment.

anonymous · Answer

100%