Probability & chance Quiz - ICSE Class 7 Mathematics
Free practice quiz: Probability & chance (ICSE Class 7 Mathematics). 61 multiple-choice questions with answers and explanations. Play online, no sign-up needed.
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A bag contains 5 red balls and 7 blue balls. If a ball is drawn at random, what is the probability of drawing a red ball?
- 5/12
- 7/12
- 5/7
- 7/5
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Answer: A. 5/12
The total number of balls in the bag is 5 (red) + 7 (blue) = 12. The number of favorable outcomes (drawing a red ball) is 5. Therefore, the probability of drawing a red ball is the number of red balls divided by the total number of balls, which is 5/12.
What is the probability of an impossible event?
- 1
- 0
- 1/2
- Undefined
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Answer: B. 0
The probability of an event that cannot happen (an impossible event) is always 0.
A die is rolled. What is the probability of getting an odd number?
- 1/2
- 1/3
- 2/3
- 1/6
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Answer: A. 1/2
When a die is rolled, the possible outcomes are 1, 2, 3, 4, 5, 6. The odd numbers are 1, 3, 5. There are 3 odd numbers. The total number of possible outcomes is 6. The probability of getting an odd number is 3/6, which simplifies to 1/2.
A letter is chosen at random from the word 'MISSISSIPPI'. What is the probability that the chosen letter is 'I'?
- 4/11
- 1/11
- 2/11
- 3/11
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Answer: A. 4/11
The word 'MISSISSIPPI' has 11 letters. The letter 'I' appears 4 times. The probability of choosing an 'I' is the number of 'I's divided by the total number of letters, which is 4/11.
From a standard deck of 52 cards, what is the probability of drawing a red face card (King, Queen, Jack of Hearts or Diamonds)?
- 3/52
- 6/52
- 12/52
- 9/52
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Answer: B. 6/52
There are 3 face cards (King, Queen, Jack) in the suit of Hearts, and 3 face cards in the suit of Diamonds. All these cards are red. So, the total number of red face cards is 3 + 3 = 6. The probability is 6/52, which simplifies to 3/26.