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BECE Mathematics 2014 Paper
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© africaexams.com
Question : 26
Total: 40
There are 20 identical balls in a box. Twelve are blue and the rest are green. If one ball is taken at random from the box, find the probability that the ball is green.
1
20
2
5
3
5
3
4
Validate
Solution:
Probability
=
Number of possible selection
Total number of samples
Total number of samples
=
20
12
of the balls are blue
Number of green balls
=
20
−
12
=
8
Number of possible selection of a green ball
=
8
Probability
(
Green ball
)
=
8
20
=
2
5
Note: 4 divides 8,2 times and 20, 5 times.
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