The venn diagram above shows the numbers of stu... - JAMB Mathematics 2002 Question
A
0.38
B
0.13
C
0.50
D
0.25
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Correct Option: D
30 - x + x + 40 - x = 80 - 20
70 - x = 60
-
x = 60 - 70
-
x = - 10
∴ x = 10
Music only = 30 - x
= 30 - 10
20
P(music only) = 20/80
= 1/4
= 0.25
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