A box contain 2 white and 3 blue identical balls. If two balls are picked at random, one after the other, without replacement, what is the probability of picking two balls of different colours?

• A.\(\frac{5}{25}\)
• B.\(\frac{7}{20}\)
• C.\(\frac{3}{5}\)
• D.\(\frac{2}{3}\)
• E.\(\frac{5}{6}\)