Urn A contains 6 white and 2 black balls; urn B contains 5 white and 3 black balls and urn C contains 4 white and 4 black balls. If an urn is chosen at random and a ball is drawn at random from it, then the probability that the ball drawn is white is

• A

  $\frac{3}{8}$
• Correct answer
  B

  $\frac{5}{8}$
• C

  $\frac{1}{2}$
• D

  $\frac{3}{4}$

Hence, the correct answer is option: 'B'.