A number is chosen at random from the set (1 ,2,3 ....,9, 10). What is
MATHEMATICS
WAEC 1992
A number is chosen at random from the set (1 ,2,3 ....,9, 10). What is the probability that the number is greater than or equal to 7?
- A. 1/10
- B. 3/10
- C. 2/5
- D. 3/5
Correct Answer: C. 2/5
Explanation
The given set {1, 2, 3, 4 ...., 9, 10}
(x ? 7 ) = 7 7, 8, 9, 10 = 4
Total number of possible outcome = 10
4/10 = 2/5
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