(i) White?
Total numbers of red balls = 3
Number of black balls = 5
Number of white balls = 4
Total number of balls = 3 + 5 + 4 = 12
Probability of getting a white ball is = \(\frac{Total\,number\,of\,white\,balls}{Total\,number\,of\,balls}\) = \(\frac{4}{12}= \frac{1}{3}\)
(ii) red?
Total numbers of red balls = 3
Number of black balls = 5
Number of white balls = 4
Total number of balls = 3 + 5 + 4 = 12
Probability of getting a red ball is = \(\frac{Total\,number\,of\,red\,balls}{Total\,number\,of\,balls}\) = \(\frac{3}{12}= \frac{1}{4}\)
(iii) black?
Total numbers of red balls = 3
Number of black balls = 5
Number of white balls = 4
Total number of balls = 3 + 5 + 4 = 12
Probability of getting a black ball is = \(\frac{Total\,number\,of\,black\,balls}{Total\,number\,of\,balls}\) = \(\frac{5}{12}\)
(iv) not red?
Total numbers of red balls = 3
Number of black balls = 5
Number of white balls = 4
Total number of Non red balls = 5 + 4 = 9
Probability of getting a non red ball is = \(\frac{Total\,number\,of\,non\,red\,balls}{Total\,number\,of\,balls}\) = \(\frac{9}{12}=\frac{3}{4}\)
