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?

Question

anonymous · Answer

flutter you

anonymous · Answer

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

swissgirl · Answer

ok so we have 25 coins altogether

swissgirl · Answer

and we have 9 dimes

anonymous · Answer

okay im following

swissgirl · Answer

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

anonymous · Answer

Yeah?

swissgirl · Answer

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 · Answer

The second time we choose a coin

anonymous · Answer

okay i get you

swissgirl · Answer

there are only 24 coins left cuz we picked a dime

anonymous · Answer

okay

swissgirl · Answer

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

swissgirl · Answer

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

anonymous · Answer

so the answer would be 3/25, right?

swissgirl · Answer

yup :)

anonymous · Answer

Omg! Thank You So Much!(: