Question

(2) A bag contains 18 balls out of which xballs are red.
(i) If one ball is drawn at random from the bag, what is the probability that it is
red?
(ii) If 2 more red balls are put in the bag, the probability of drawing a red ball will be
times the probability of drawing a red ball in the first case. Find the value of x​

Answer 1

total number of balls=18

number of red balls= x

1.P(getting a red ball)= x/18

2. total number of balls= 18+2=20

number . of red balls= x+2

P(getting a red ball)= x+2/20

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