Question

A box contains 5 green, 4 yellow and 3 white marbles. Three marbles are drawn at random.
What is the probability that they are not of the same colour?​

Answer 1

Answer:

11

Step-by-step explanation:

Answer 2

Total Cases= $12_C_3$ = 12×11×10÷3×2×1=220

Total cases of drawing same colour=$5_C__3+4_C__3+3_C__3$=3/44

Probability of not same colour = 1 - 3/44

                                                   = 41/44

Hope it is helpful.This is my first time helping

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