JSCE Mathematics 2024 Objective — Question 51
Question 51 of 80 from the Junior Secondary Certificate Examination (JSCE) Mathematics 2024 Objective paper, with the correct answer and a full explanation.
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There are colored balls in a basket. The balls are 4 red, 1 green, x -yellow and 4x -blue balls. The probability of picking a red ball is 0.2. What is the sum of the probability of picking a yellow and a blue ball?
- A. 1/4
- B. 3/4Correct
- C. 2/5
- D. 1/2
Explanation
Total = 5 + 5x and 4/(5 + 5x) = 0.2, so 5 + 5x = 20 and x = 3. Yellow = 3 and blue = 12, so P = 15/20 = 3/4.
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