Question

A box Contains 18 balls out of which a are blue and
others are red in colour. The no. of red balls is half of
The no. of blue balls. what is the probability that
a ball drawn at random is & blue ball and red ball​

Answer 1

Answer:

Blue = 2/3       red = 1/3  

Step-by-step explanation:

Let the no. of red balls be x and no. of blue balls be y.

Thus x=y/2   (given in question)

x+y=18

y/2+y=18

y+2y=18*2

y=18*2/3

=12

Thus number of blue balls is 12

No. of red balls is 18-12 = 6

Probability of red ball is 6/18==1/3=0.33

Probability of blue ball is 12/18 == 2/3=0.67

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