Question 1128226: A bag contains different colored beads. The probability of drawing two black beads from the bag without replacement is 335 , and the probability of drawing one black bead is 310 .
What is the probability of drawing a second black bead, given that the first bead is black?
Found 2 solutions by ikleyn, sapphira :
Answer by ikleyn(52852)   (Show Source):
You can put this solution on YOUR website! .
For your info and your education:
The probability values are ALWAYS between zero and 1 (inclusively),
but NEVER are out of this interval.
So, through your post to the GARBAGE BOX, which is THE ONLY PLACE for it.
Also remember, if at the exam or at the test you will say that the probability can be 335 or 310,
you will get the lowest possible score IMMEDIATELY.
It is, actually, "a shame" to pronounce it, demonstrating total absence of knowledge, related to the Probability basics.
It is the same as to say 2 x 2 = 3 in Arithmetic.
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Have a nice evening / night / morning / afternoon / day / week.
Answer by sapphira (1)  (Show Source):
You can put this solution on YOUR website! So there is 15 black and 35 non-black and 50 altogether
If one black has already been selected then there will be 14 black and 49 altogether remaining.
So the probability of selecting a second black is 14/49 simplified to 2/7.
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