A bag contains 27 balls. Ten are red, 2 are green and the rest are whi

1.	A bag contains 27 balls. Ten are red, 2 are green and the rest are white. Annie takes out a ball from the bag at random. What is the probability that she takes (i) a white ball (ii) a ball that is red or green
Answer» (i) Number of white balls = 27 – (10 + 2) = 15 P(white ball) = \(\frac{Number\,of\,white\,balls}{Total\,number\,of\,balls}\) = \(\frac{15}{27}\) = \(\frac{5}{9}\) (ii) P (red ball or green ball) = P (red) + P (green) = \(\frac{10}{27}+\frac{2}{27}\) = \(\frac{12}{27}\) = \(\frac{4}{9}\) .

A bag contains 27 balls. Ten are red, 2 are green and the rest are white. Annie takes out a ball from the bag at random. What is the probability that she takes (i) a white ball (ii) a ball that is red or green

Answer»

(i) Number of white balls = 27 – (10 + 2) = 15

P(white ball) = \(\frac{Number\,of\,white\,balls}{Total\,number\,of\,balls}\) = \(\frac{15}{27}\) = \(\frac{5}{9}\)

(ii) P (red ball or green ball) = P (red) + P (green)

= \(\frac{10}{27}+\frac{2}{27}\) = \(\frac{12}{27}\) = \(\frac{4}{9}\) .

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A bag contains 27 balls. Ten are red, 2 are green and the rest are white. Annie takes out a ball from the bag at random. What is the probability that she takes (i) a white ball (ii) a ball that is red or green

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