35. Two bags contain discs.
Bag A contains 12 discs.
5 of the discs are red, 6 are blue and 1 is
white.
Bag B contains 25 discs.
n of the discs are red and the rest are blue.
James takes at random a disc from Bag A.
Lucy takes at random a disc from Bag B.
Given that the probability that James and
Lucy both take a red disc is
15
2
(i) find the value of n, the number of red discs
in Bag B.
(ii) Hence calculate the probability that James
and Lucy take discs of different colours.