TLS Online TPP Program

#Question id: 14514


A bag contains 7 red, 5 blue, 4 white and 4 black balls. Then the probability that a ball drawn at random is red or white is

#SCPH01 Biochemistry
  1. 11 / 20
  2. 1 / 7
  3. 1 / 11
  4. 3 / 20