Basic Probability Concepts Quiz - CBSE Class 12 Mathematics
Free practice quiz: Basic Probability Concepts (CBSE Class 12 Mathematics). 17 multiple-choice questions with answers and explanations. Play online, no sign-up needed.
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What is the probability of getting a tail when a fair coin is tossed?
- 0
- 0.25
- 0.5
- 1
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Answer: C. 0.5
A fair coin has two sides: heads and tails. Therefore, the probability of getting a tail is 1 favorable outcome (tail) out of 2 possible outcomes (head or tail), which is 0.5.
What is the probability of drawing a queen from a standard deck of cards?
- 1/52
- 1/13
- 3/52
- 4/52
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Answer: B. 1/13
In a standard deck of 52 cards, there are 4 queens. The probability of drawing a queen is the number of queens (4) divided by the total number of cards (52), which simplifies to 1/13.
A box contains 5 red, 3 blue, and 2 green balls. What is the probability of randomly selecting a blue ball?
- 1/10
- 3/10
- 1/5
- 3/5
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Answer: B. 3/10
The total number of balls is 5 (red) + 3 (blue) + 2 (green) = 10. The probability of selecting a blue ball is the number of blue balls (3) divided by the total number of balls (10), which equals 3/10.
In a probability experiment, what does a probability of 1 indicate?
- The event is impossible
- The event is certain
- The event may or may not happen
- The event cannot occur
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Answer: B. The event is certain
A probability of 1 indicates that the event will certainly occur. For instance, if the probability of it raining tomorrow is 1, it means that it will definitely rain.
What is the probability that a randomly selected day is a Saturday in a week?
- 1/7
- 1/5
- 1/2
- 1
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Answer: A. 1/7
A week has 7 days. The probability of randomly selecting a Saturday is the number of favorable outcomes (1 Saturday) over the total number of days (7), which is 1/7.