Question

Ajar contains a mixture of 20 black marbles, 16 red marbles, and 4 white marbles, all the same size. Find the probability

of drawing a white or red marble on the first draw.
125
12
01
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Answer 1

1/2

Explanation:

16+4 =20 red and white marbles

40 marbles in all

20/40= 1/2

Answer 2

`|\Omega|=20+16+4=40\\|A|16+4=20\\\\P(A)=(20)/(40)=(1)/(2)`