Question

A bag contains 12 blue balls and x red balls. If one ball is drawn at random (i) what is

the probability that it will be a red ball? (ii) If 8 more red balls are put in the bag, and if

the probability of drawing a red ball will be twice that of the probability in (i), then find x.​

Answer 1

Answer:

x is equal to 4

(i) probability of red balls thus become 4/16

which is equal to 1/4

(ii) probability of red balls= 4+8/12+4+8

I.e 12/24= 1/2