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What is the tip and ring color for pair 31 in a 100 pair cable?

Blue/red in the second 25 pair binder group


A deck of cards has 3 blue 4 black and 6 purple You pick 2 cards from the deck cards are not returned to the deck after they are picked whats the probability that two blue are picked?

First you have 3 blues out of 13 cards, so the first card has probability 3/13. Then you have 2 blues out of 12 cards, so the second card has probability 2/12 or 1/6. The probability of both being blue is the product of these probabilities: P(two blues) = P(first blue) * P(second blue) = (3/13) * (1/6) = 3/78 or 1/26


A bag contains 8 marbles 4 are blue 3 are green and one is orange you draw out one marble and then another without replacing the first marble Find the probability of drawing 2 blue marbles?

Probability of drawing a blue marble first is 4 in 8 (or 50%) Probability of drawing a blue marble second is 3 in 7 (or 42.85714%) Probablility of drawing blue then blue is the two above multiplied 0.5 * 0.4285714 Which is 0.212142407 or 21% or One in Five.


Draw one ball colored red from a bag Draw one ball colored blue from the same bag Are these two mutually exclusive?

No. Drawing a red ball and then a blue ball from a bag are not mutually exclusive events, because the first event changes the probability of the second event, unless you return the first ball to the bag before drawing the second ball.


There are 30 balls out of which 60percent are green balls and rest are blue balls How many ways that you can pick the pair of blue balls?

There are 18 Green balls and 12 Blue balls. You have to pick 2 blue balls, so the green balls don't matter. You can pick 1 blue ball on 12 ways. The second ball you can pick on 11 ways (because there are 11 balls left). 12 * 11 = 132. So you can pick it on 132 ways. ;)