⇒P(E)= Number of getting outcomes/Total number of all possible outcomes Calculation ⇒ Total outcomes =5+8+7=20 ⇒ Number of getting outcomes = number of red ball + number of blue ball =5+7=12 ⇒P(E)=12∕20=3∕5 ∴ Probability of getting red and blue ball =3∕5