jacky27
Andrea's change purse contained 8 quarters, 9 dimes, and 8 nickels.If andrea chose 2 coins randomly without replacing them in her purse,what is the probability that she chose 2 dimes?
Delete
Share
This Question is Closed
jacky27
Best Response
You've already chosen the best response.
0
uhm, excuse me. but can i get an explanation on this problem,please really stuck on this.
swissgirl
Best Response
You've already chosen the best response.
1
ok so we have 25 coins altogether
swissgirl
Best Response
You've already chosen the best response.
1
and we have 9 dimes
jacky27
Best Response
You've already chosen the best response.
0
okay im following
swissgirl
Best Response
You've already chosen the best response.
1
So the first time we choose a coin the probability that it will be a dime is 9/25 correct?
jacky27
Best Response
You've already chosen the best response.
0
Yeah?
swissgirl
Best Response
You've already chosen the best response.
1
ya there are 25 coins altogether and 9 dimes so the probability that it will be a dime is dimes/total amt of coins = 9/25
swissgirl
Best Response
You've already chosen the best response.
1
The second time we choose a coin
jacky27
Best Response
You've already chosen the best response.
0
okay i get you
swissgirl
Best Response
You've already chosen the best response.
1
there are only 24 coins left cuz we picked a dime
jacky27
Best Response
You've already chosen the best response.
0
okay
swissgirl
Best Response
You've already chosen the best response.
1
so there are 24 coins and 8 dimes so the probabiity we will choose a dime is 8/24
swissgirl
Best Response
You've already chosen the best response.
1
So altogether the probability that we will choose 2 dimes is 9/25*8/24
jacky27
Best Response
You've already chosen the best response.
0
so the answer would be 3/25, right?
swissgirl
Best Response
You've already chosen the best response.
1
yup :)
jacky27
Best Response
You've already chosen the best response.
0
Omg! Thank You So Much!(: