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WAEC Mathematics 1997 Question 49

Question 49

Probability

A bag contains red, black and green identical balls. A ball is picked and replaced. The table shows the result of 100 trials. Find the experimental probability of picking a green ball.
Colour of ball: Red, Black, Green
No. of occurrences: 54, 30, 16

  1. A.16
  2. B.21/25
  3. C.1/3
  4. D.4/21
  5. E.4/25.
Show the answer and explanation

Answer: E (4/25.)

Explanation

Green came up 16 times in 100 trials: 16/100 = 4/25.