JAMB and WAEC Mathematics questions: Probability

48 questions with answers and explanations. Tap an option to check yourself.

1. Question 41· Probability· WAEC

   The probability that Chidi wins a race is 0.42. What is the probability that he does not win?

   • A1.42
   • B0.42
   • C0.5
   • D0.58

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   Explanation and discussion

2. Question 42· Probability· WAEC

   A bag contains 5 red and 3 blue balls. A ball is picked at random. Find the probability that it is blue.

   • A3/5
   • B5/8
   • C3/8
   • D1/3

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   Explanation and discussion

3. Question 43· Probability· WAEC

   A fair die is rolled once. Find the probability of getting a prime number.

   • A1/3
   • B1/2
   • C2/3
   • D1/6

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   Explanation and discussion

4. Question 44· Probability· WAEC

   A box contains 4 green, 6 yellow and 2 white beads. One bead is chosen at random. Find the probability that it is yellow.

   • A2/3
   • B1/3
   • C1/6
   • D1/2

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5. Question 45· Probability· JAMB

   A bag contains 2 red and 3 blue balls. Two balls are drawn one after the other with replacement. Find the probability that both are blue.

   • A9/25
   • B3/10
   • C6/25
   • D3/5

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6. Question 46· Probability· JAMB

   A fair die is thrown once. What is the probability of getting an even number?

   • A1/3
   • B½
   • C1/6
   • D2/3

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7. Question 47· Probability· WAEC

   The probability that Ada passes an examination is 0.7. What is the probability that she fails?

   • A0.7
   • B0.3
   • C1.7
   • D0.07

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8. Question 48· Probability· JAMB

   A fair coin is tossed three times. What is the probability of getting three heads?

   • A1/3
   • B1/8
   • C3/8
   • D1/6

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   Explanation and discussion