Question

****************Probability*****************

A bag contains five red chips, 3 blue chips, and 2 yellow chips. Two chips are selected from the bag, without replacement. Determine the probability that two chips of the same color are selected

Answer 1

gotta do it for each color

Answer 2

Oh can I give direct answers Oh right no sorry

Answer 3

i did for Red, I got 1/2 Blue, 3/10 Yellow, 1/5

Answer 4

hold on

Answer 5

but I don't know what to do after that

Answer 6

and alright thank you

Answer 7

start with yellow. That's the easiest

Answer 8

two red is not right
probability first is red is \(\frac{1}{2}\) then the probability second is red given the first is red is
\[\frac{4}{9}\] since there are 9 left and 4 red ones
so probababiltyi both are red is
\[\frac{1}{2}\times \frac{4}{9}=\frac{2}{9}\]

Answer 9

other two are similar
once you get the other two, add them up

Answer 10

oh right I forgot to take into account that the chip wasn't put back

Answer 11

getting 2 blue is very similar, except you start with 3, not 5

Answer 12

for blue i got 1/15, and yellow 1/45

Answer 13

i didn't do it but i can check

Answer 14

1/15 is right

Answer 15

so is 1/45

Answer 16

you said to add them up at the end so i make all the denominators the same right?

Answer 17

yes of course
or use a calculator
but you can use a denominator of 45 for each

Answer 18

http://www.wolframalpha.com/input/?i=2%2F9%2B1%2F15%2B1%2F45

Answer 19

14/45?

Answer 20

yup

Answer 21

oh alright perfect thank you you helped alot!

Answer 22

yw glad to help