Question

heelp.!!
two urns contain white balls and yellow balls. the first urn contains 2 white balls and 7 yellow balls and the second urn contains 10 white balls and 4 yellow balls. a ball is drawn at random from each urn. what is the probability that both balls are white?

Answer 1

A)2/21
B)10/63
C)1/20
D)12/23

Answer 2

put the number of white balls in the 1st urn over the total number of balls in the 1st urn
2/(2+7) = 2/9
put the number of white balls in the 2nd urn over the total number of balls in the 2nd urn
10/(10+4) = 10/14 or 5/7
multiply the 1st probability 2/9 times the 2nd probability 5/7

Answer 3

ok i got 10/63??

Answer 4

is that correct

Answer 5

yes---good job!

Answer 6

thank you so much .!!!