Probability
ICSE · Class 7 · Mathematics
Practice quiz for Probability — ICSE Class 7 Mathematics. MCQs and questions with answers to test your preparation.
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Quick Quiz: Probability
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A coin is tossed 40 times and head is obtained 14 times. What is the probability of getting a head?
A coin is tossed 40 times and head is obtained 14 times. What is the probability of getting a tail?
Out of 400 students, 165 like tea only and 120 like coffee only. How many students like both tea and coffee, and what is the probability of choosing such a student?
A die is thrown 50 times and the outcome 5 appears 8 times. What is the probability of getting 5?
Sample Questions
A die is thrown 20 times and the outcomes 1, 2, 3, 4, 5, 6 appear 4, 3, 3, 4, 4, 2 times respectively. What is the probability of getting a number less than 4?
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1/2
Step 1: Numbers less than 4 are 1, 2, and 3. Step 2: Their counts are 4, 3, and 3. Step 3: Total favourable outcomes = 4 + 3 + 3 = 10. Step 4: Total throws = 20. Step 5: Probability = 10/20 = 1/2.
A die is thrown 20 times and the outcomes 1, 2, 3, 4, 5, 6 appear 4, 3, 3, 4, 4, 2 times respectively. What is the probability of getting an even number?
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9/20
Step 1: Even numbers are 2, 4, and 6. Step 2: Their counts are 3, 4, and 2. Step 3: Total favourable outcomes = 3 + 4 + 2 = 9. Step 4: Total throws = 20. Step 5: Probability = 9/20.
A die is thrown 20 times and the outcomes 1, 2, 3, 4, 5, 6 appear 4, 3, 3, 4, 4, 2 times respectively. What is the probability of getting an odd number?
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11/20
Step 1: Odd numbers are 1, 3, and 5. Step 2: Their counts are 4, 3, and 4. Step 3: Total favourable outcomes = 4 + 3 + 4 = 11. Step 4: Total throws = 20. Step 5: Probability = 11/20.
A coin is tossed 5 times and heads occur 3 times. In a second experiment, exactly one head out of 5 trials occurs 2 times. What is the probability of getting a head in the first experiment and exactly one head in the second experiment?
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3/5 and 2/5
Step 1: In the first experiment, head appears 3 times out of 5, so probability = 3/5. Step 2: In the second experiment, exactly one head occurs 2 times out of 5, so probability = 2/5. Step 3: The required pair is 3/5 and 2/5.
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