WASSCE Statistics & Probability Questions with Step-by-Step Solutions
Statistics and Probability is often the fastest section to score in for well-prepared students. WASSCE items focus on measures of central tendency from frequency and grouped-frequency tables, standard deviation, bar charts, pie charts, cumulative frequency curves, and simple probability with and without replacement. The SHSMathPro question bank uses real Ghanaian data sets — class scores, market sales, rainfall figures — so the interpretation practice is realistic.
What WASSCE tests in Statistics & Probability
- Mean, median and mode from raw and grouped data
- Frequency and cumulative frequency tables
- Bar charts, pie charts and histograms
- Range, variance and standard deviation
- Simple probability and sample spaces
- Mutually exclusive and independent events
- Probability with and without replacement
- Permutations and combinations basics
Sample Statistics & Probability practice questions
131 Statistics & Probability questions are currently in the SHSMathPro question bank. Answers and step-by-step solutions are shown inside the quiz.
1. Which average is most affected by extreme values (outliers)?
- A. Mode
- B. Median
- C. Mean
- D. None
SHS 1
2. If the probability of passing an exam is 0.85, what is the probability of failing?
- A. 0.15
- B. 0.25
- C. 0.85
- D. 1
SHS 1
3. What is the sum of probabilities of all possible outcomes in a sample space?
- A. 0
- B. 0.5
- C. 1
- D. 2
SHS 1
4. The mean of 5 numbers is 12. If a sixth number 18 is added, find the new mean.
- A. 12
- B. 13
- C. 14
- D. 15
SHS 1
5. A bag contains 3 red balls and 5 blue balls. If one ball is drawn at random, what is the probability of drawing a red ball?
- A. 3/8
- B. 5/8
- C. 3/8
- D. 5/3
SHS 1
6. A fair die is rolled once. What is the probability of getting an even number?
- A. 1/6
- B. 1/3
- C. 1/2
- D. 2/3
SHS 1
Statistics & Probability: common questions
- How much of WASSCE Core Maths is statistics?
- Statistics and probability typically account for a reliable block of marks in both papers, including at least one essay question on grouped data or probability.
- What is the quickest way to improve in probability?
- Practise writing the sample space before calculating. Most lost marks come from miscounting outcomes, not from the arithmetic.
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