(a) A bag contains 4 red, 3 blue and 2 whiteballs. If three balls are

1.	(a) A bag contains 4 red, 3 blue and 2 whiteballs. If three balls are drawn one by one(without replacement), what is the probabilitythat all three balls are red?(b) Two dice are thrown simultaneously. Whatis the probability of obtaining a total scoreof 7?
Answer» Ans :- On a two unbiased dice, there are36(6×6) possible outcomes. In order to get a sum equal to 7, the outcome from the two unbiased dice should be either of the following:{1,6} {2,5} {3,4} {4,3} {5,2} {6,1} There are 6 possible outcomes that will result to a sum of 7. So: =6/36=1/6=0.167=0.167or16.67% The probability of getting a sum equal to 7 is16.67%.

(a) A bag contains 4 red, 3 blue and 2 whiteballs. If three balls are drawn one by one(without replacement), what is the probabilitythat all three balls are red?(b) Two dice are thrown simultaneously. Whatis the probability of obtaining a total scoreof 7?

Answer»

Ans :- On a two unbiased dice, there are36(6×6) possible outcomes.

In order to get a sum equal to 7, the outcome from the two unbiased dice should be either of the following:{1,6} {2,5} {3,4} {4,3} {5,2} {6,1}

There are 6 possible outcomes that will result to a sum of 7. So:

=6/36=1/6=0.167=0.167or16.67%

The probability of getting a sum equal to 7 is16.67%.