Grade 12 Quizzes, Questions & Answers
Recent Grade 12 Quizzes
How can you handle overlapping sets without double-counting? In this quiz, you’ll explore the two-set inclusion–exclusion principle and learn how it corrects overcounts by subtracting shared elements. You’ll...
Questions: 20 | Attempts: 10 | Last updated: Dec 17, 2025
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Sample QuestionGiven |A|=30, |B|=25, and |A ∩ B|=12, what is |A ∪ B|?
In this quiz, you'll apply your knowledge of margin of error to real-world scenarios. Questions involve analyzing polling data, interpreting confidence intervals, and comparing estimates. You'll also consider how sample...
Questions: 22 | Attempts: 12 | Last updated: Jan 23, 2026
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Sample QuestionA poll of 1,000 adults reports that 58% support a new policy with a margin of error of ±3% (95% confidence). Which interval best represents the plausible range for true support?
This quiz provides you with sample data and requires you to calculate margin of error for population estimates. You'll practice interpreting confidence intervals and understanding how the margin of error applies to estimating...
Questions: 22 | Attempts: 10 | Last updated: Jan 23, 2026
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Sample QuestionA random sample of 400 voters shows that 52% support a new policy. The margin of error is ±3%. What is the confidence interval for the true population proportion?
This quiz focuses on sampling variability and how it affects estimates. You'll learn how to interpret margin of error in the context of sample data and make informed decisions about sample sizes. By using simulation models,...
Questions: 22 | Attempts: 11 | Last updated: Jan 27, 2026
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Sample QuestionWhich of the following is the best point estimate of the population proportion who prefer the library based on the simulations?
In this quiz, you’ll practice using sample data to estimate population parameters, including population means and proportions. You'll also work with margin of error and confidence intervals to assess the precision of...
Questions: 22 | Attempts: 18 | Last updated: Jan 23, 2026
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Sample QuestionA random sample of 40 students shows that 14 prefer studying in the morning. What is the best estimate of the proportion of all students who prefer morning study?
This final quiz delves into multi-step problems where expected value calculations are used in complex scenarios like product launches, public transportation, and game decisions. It challenges you to calculate expected values in...
Questions: 22 | Attempts: 10 | Last updated: Jan 23, 2026
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Sample QuestionA carnival game costs $4 to play. You draw a ball with probabilities: 50% win $2, 30% win $4, 15% win $6, 5% win $20. What is the expected net gain/loss per play?
This quiz focuses on applying expected value to real-world decisions. It explores situations involving carnival games, lotteries, insurance policies, and investments, where the goal is to evaluate the expected net gains or losses...
Questions: 21 | Attempts: 10 | Last updated: Jan 23, 2026
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Sample QuestionWhat is the expected payout (before subtracting the $3 cost) of one spin?
This quiz will help you calculate expected values for discrete distributions. It includes problems involving random variables such as arcade tickets, raffles, dice rolls, and defects per item, helping you understand the expected...
Questions: 24 | Attempts: 10 | Last updated: Jan 23, 2026
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Sample QuestionWhat is the expected value (mean) of tickets won per game?
This quiz tests your understanding of expected value concepts and their interpretation in probability distributions. Questions involve calculating expected values for discrete random variables, interpreting them in real-world...
Questions: 22 | Attempts: 11 | Last updated: Jan 23, 2026
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Sample QuestionWhat does the expected value of a random variable represent?
This quiz provides practical exercises in constructing Cumulative Distribution Tables (CDF tables) and interpreting them. The goal is to calculate cumulative frequencies, cumulative relative frequencies, and construct cumulative...
Questions: 23 | Attempts: 12 | Last updated: Jan 23, 2026
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Sample QuestionWhat is the cumulative frequency for students who studied 8 hours or less?
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