Question

There are 30 blue balls and x red balls in a
bag. A ball is drawn at random from the bag.
(i) Write down, in terms of x, an expression
for the probability that the ball drawn is
red.

(ii) Given that the probability is
7/13
find x.​

Answer 1

$\huge\orange{Question:}$

There are 30 blue balls and x red balls in abag. A ball is drawn at random from the bag.(i) Write down, in terms of x, an expressionfor the probability that the ball drawn isred.

$\huge\pink{Answer:}$

No.of blue balls = 30

No.of red balls = x

Total no. of balls = x+ 30

probability of getting red ball = x/(x+30)

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