There are two urns `Aa n dB`
. Urn `A`
contains 5 red, 3 blue and 2 white balls, urn `B`
contains 4 re3d, 3 blue, and 3 white balls. An urn is chosen at random
and a ball is drawn. Probability that eh bal drawn is red is
`9//10`
b. `1//2`
c. `11//20`
d. `9//20`
A. `9//10`
B. `1//2`
C. `11//20`
D. `9//20`