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
  • E 7/10
waec 1992mathematics

The correct answer is C. 2/5

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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