Page 375 - NUMINO_WB_6B
P. 375
186-B5-1
Dependent Events
1. Find the probability.
Example
There are three marbles numbered 1 and four marbles numbered 2. Take one
marble out of the box. Then, take out another marble without putting the 1st marble
back in the box.
22 1
1 2
1
2
a. There are 6 cards in a box. Two out of six cards are the winning cards. Ricky
took out 1 card from the box. Jessica took out another card without putting
back Ricky’s card. Find the probability that both Ricky and Jessica will take out
the winning cards. BBB
AA
WW
b. 3 out of 8 products are wrong. Test one product and test another product
without excluding the first tested product. Find the probability that both tested
products will be faulty.
Dependent Events
1. Find the probability.
Example
There are three marbles numbered 1 and four marbles numbered 2. Take one
marble out of the box. Then, take out another marble without putting the 1st marble
back in the box.
22 1
1 2
1
2
a. There are 6 cards in a box. Two out of six cards are the winning cards. Ricky
took out 1 card from the box. Jessica took out another card without putting
back Ricky’s card. Find the probability that both Ricky and Jessica will take out
the winning cards. BBB
AA
WW
b. 3 out of 8 products are wrong. Test one product and test another product
without excluding the first tested product. Find the probability that both tested
products will be faulty.
