Question

In your pocket you have 2 quarters, 3 dimes, and 4 nickels. If you select three coins from your pocket, what is the probability that you will select exactly 30 cents?

Answer 1

well what ways can you get 30 cents?

Answer 2

dime+dime+dime

Answer 3

a quarter and a nickel

Answer 4

thats only 2
coins

Answer 5

1 quarter and a nikel
3 dimes
2 dimes 2 nickels
1 dime 4 nickels

i think about 4 or 5 possible ways given the coins

Answer 6

remember we are picking 3 coins specifically

Answer 7

ok

Answer 8

oh

Answer 9

10+10+10

Answer 10

i think thats the only way

Answer 11

it is only out of 3 coins to select

Answer 12

so we need to get a fraction out of all the possible ways

Answer 13

that will be your answer

Answer 14

so is my answer 1/9
?

Answer 15

i think that may be right

Answer 16

im not sure though. i feel like there should be more possibilities of picking 3 coins

Answer 17

perhaps i should do 9 C 3
or 9 P 3

Answer 18

but im not sure which one

Answer 19

well try to put the possibilities that will only give you 30 cents

Answer 20

right but there is only 1 possibility

Answer 21

so it is 1/total number of all 3 coin possibilities

Answer 22

and since order does not necessarily matter we should use 9 C 3 to find out how many possiblilities there are

Answer 23

1/84 i believe is the answer