## jacky27 2 years ago 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?

1. FutureMathProfessor

flutter you

2. jacky27

uhm, excuse me. but can i get an explanation on this problem,please really stuck on this.

3. swissgirl

ok so we have 25 coins altogether

4. swissgirl

and we have 9 dimes

5. jacky27

okay im following

6. swissgirl

So the first time we choose a coin the probability that it will be a dime is 9/25 correct?

7. jacky27

Yeah?

8. swissgirl

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

9. swissgirl

The second time we choose a coin

10. jacky27

okay i get you

11. swissgirl

there are only 24 coins left cuz we picked a dime

12. jacky27

okay

13. swissgirl

so there are 24 coins and 8 dimes so the probabiity we will choose a dime is 8/24

14. swissgirl

So altogether the probability that we will choose 2 dimes is 9/25*8/24

15. jacky27

so the answer would be 3/25, right?

16. swissgirl

yup :)

17. jacky27

Omg! Thank You So Much!(: