I wonder if my approach to this is correct-
Say I have a jar with 10 balls, 9 of which are green and 1 that is red. I start taking out a ball at a time until I get the red ball out. What's the probability of taking 6 balls out? (No repetition)
I thought this might be a case of conditional probability? Basically taking 6 balls out would mean the 6th ball has to be red. so 9/10*8/9*7/8*6/7*5/6*1/5=0.1
Is this correct?
Thanks
Say I have a jar with 10 balls, 9 of which are green and 1 that is red. I start taking out a ball at a time until I get the red ball out. What's the probability of taking 6 balls out? (No repetition)
I thought this might be a case of conditional probability? Basically taking 6 balls out would mean the 6th ball has to be red. so 9/10*8/9*7/8*6/7*5/6*1/5=0.1
Is this correct?
Thanks