The result of tossing a fair die 120 times is s... - JAMB Mathematics 2003 Question
A
19
B
20
C
21
D
22
correct option: b
12 + 20 + x + 21 + x-1 +28 = 120
2x + 80 = 120
2x = 120 - 80
2x = 40
x = 20
2x + 80 = 120
2x = 120 - 80
2x = 40
x = 20
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