Probability — Practice Quiz
Gujarat Board · Class 10 · Mathematics
Try a 4-question quiz on Probability for Gujarat Board Class 10 Mathematics: tap an answer to check it and see why. 43 questions in the full chapter test.
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Quick Quiz: Probability
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A fair die is thrown once. What is the probability of getting a number less than 4?
A bag contains 5 red balls, 3 blue balls, and 2 green balls. What is the probability of drawing a red ball?
If P(E) = 3/5, what is P(not E)?
A card is drawn from a standard deck of 52 cards. What is the probability of drawing a king?
Sample Questions
Which of the following represent impossible events? (Select all correct answers)
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Getting a 7 on a standard die, Drawing a red card from a deck of only black cards, Drawing a card with number 15 from a standard deck
Impossible events have probability 0. A standard die only has numbers 1-6 (no 7), a deck of only black cards has no red cards, and standard cards don't have number 15. Getting heads on a coin and even numbers on a die are possible events.
A spinner has 8 equal sectors numbered 1 to 8. What is the probability of getting a prime number?
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1/2
Prime numbers from 1 to 8 are: 2, 3, 5, 7 (that's 4 numbers). Total outcomes = 8. P(prime) = 4/8 = 1/2. Remember: 1 is not a prime number, and prime numbers have exactly two factors.
Two coins are tossed simultaneously. What is the probability of getting exactly one head?
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1/2
Possible outcomes when tossing two coins: HH, HT, TH, TT (4 total outcomes). Exactly one head occurs in: HT, TH (2 favorable outcomes). P(exactly one head) = 2/4 = 1/2.
Which of the following probabilities are valid? (Select all correct answers)
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0.7, 0, 1
Probability values must satisfy 0 ≤ P(E) ≤ 1. Valid probabilities: 0.7 (between 0 and 1), 0 (impossible event), 1 (certain event). Invalid: 1.2 (greater than 1), -0.3 (negative value). Probabilities cannot be negative or greater than 1.
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