A box contains 5 white, 4 green, 2 blue and 3 black marbles. If 2 marbles are 1 point
drawn at random, what is the probability that both are green or at least one
is green? *
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Step-by-step explanation:
Total cases =
12
C
3
=
3∗2∗1
12∗11∗10
=220
Total cases of drawing same colour =
5
C
3
+
4
C
3
+
3
C
3
=
$$\text{Probability of same color = \frac{15}{220}\\$$
=
44
3
Probability of not same color
1−
44
/3
=44/41
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