There are 3 white marbles and 7 blue marbles in a bag. Jamie will randomly pick two marbles out of the bag without replacing the first marble chosen. What is the probability of Jamie picking two blue marbles?

Question

anonymous · Answer

ok so there is a total of 
3 white marbles plus 7 blue marbles which is 10 marbles in total

anonymous · Answer

they are asking u to find the probability of picking two blue marbles

anonymous · Answer

i have the answer .

abb0t · Answer

The probability, first find the total marbles = 10
to pick white you have: $\sf \frac{3}{10}$
Since marble is not replaced in totles. Now you ave 9 total instead of 10 and 2 whites.
So now you have: $\sf \frac{2}{9}$
So by multiplicative rule, multiply them to see what you get