Question: a bag contains 3 red , 6 yellow and 8 green balls . 3 balls are drawn randomly . what is the probability that the balls drawn contain balls of different colours ?
A) 2 / 7
B) 3 / 5
C) 3 / 11
D) 18 / 85
E) 7 / 16
Correct answer: D
Grade: 7 | Topic: Statistics and Probability | Difficulty: Easy | Standard: 7.SP.C.7