how would I determine the sample space of 4 marbles that's red, green, yellow and orange if two were taken out with out replacement?

Question

anonymous · Answer

would it be 2?

hartnn · Answer

for first marble,  we can take anyone out of 4 marbles, so 4 choices,
for 2nd marble, now we only have 3 marbles to choose from, so 3 choices.

overall sample space = 4 * 3

anonymous · Answer

ok so what would the probability of selecting 1 orange ball?

hartnn · Answer

only 1 orange ball ??

means you have to select 1 ball from 4 balls,
so the probability will be just 
1/4

anonymous · Answer

what about a ball that is not orange?

hartnn · Answer

you want "the probability of selecting 1 orange ball"
why would you bother about other balls ?
you only need total number of balls. and number of orange balls

anonymous · Answer

they are asking more than one ?