Page 388 - NUMINO_WB_6B
P. 388
186-P4-2
3. There are three marbles numbered 1, four marbles numbered 2, and three
marbles numbered 3 in a bag. Answer the questions.
1 3 3
2
1 2
2 1
23
a. Pull out a marble numbered 1 from the bag. Put the 1st marble back in the bag
and then pull out a marble numbered 2. Put the 2nd marble back in the bag and
then pull out the 3rd marble. Find the probability that the 3rd marble pulled will
be a marble numbered 1.
b. Pull 3 marbles without putting them back in the bag. Find the probability that
the 1st marble pulled will be numbered 1, the 2nd marble pulled will be
numbered 2, and the 3rd marble pulled will be numbered 1.
3. There are three marbles numbered 1, four marbles numbered 2, and three
marbles numbered 3 in a bag. Answer the questions.
1 3 3
2
1 2
2 1
23
a. Pull out a marble numbered 1 from the bag. Put the 1st marble back in the bag
and then pull out a marble numbered 2. Put the 2nd marble back in the bag and
then pull out the 3rd marble. Find the probability that the 3rd marble pulled will
be a marble numbered 1.
b. Pull 3 marbles without putting them back in the bag. Find the probability that
the 1st marble pulled will be numbered 1, the 2nd marble pulled will be
numbered 2, and the 3rd marble pulled will be numbered 1.
