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JAMB Mathematics 1986 Question 47

Question 47

Probability

Find the probability that a number selected at random from 40 to 50 is a prime.

  1. A.3/11
  2. B.5/11
  3. C.3/10
  4. D.4/11
Show the answer and explanation

Answer: A (3/11)

Explanation

There are 11 numbers from 40 to 50, and 41, 43 and 47 are prime. The probability is 3/11.