Probability
CBSE · Class 10 · Mathematics
Flashcards for Probability — CBSE Class 10 Mathematics. Quick Q&A cards covering key concepts, definitions, and formulas.
A coin is tossed once. What is the probability of getting a head?
Answer
Step 1: Identify total possible outcomes = {Head, Tail} = 2 outcomes. Step 2: Identify favourable outcomes for getting head = {Head} = 1 outcome. Step 3: Apply formula P(E) = Favourable outcomes/Total
A die is thrown once. Find the probability of getting an even number.
Answer
Step 1: Total possible outcomes = {1, 2, 3, 4, 5, 6} = 6 outcomes. Step 2: Favourable outcomes (even numbers) = {2, 4, 6} = 3 outcomes. Step 3: Apply P(E) = 3/6 = 1/2 = 0.5. Answer: 1/2 or 0.5
From a deck of 52 cards, one card is drawn. What is the probability of getting a king?
Answer
Step 1: Total possible outcomes = 52 cards. Step 2: Favourable outcomes (kings) = 4 kings in deck. Step 3: Apply P(E) = 4/52 = 1/13. Answer: 1/13 ≈ 0.077
A bag contains 5 red balls and 3 blue balls. One ball is drawn randomly. Find P(red ball).
Answer
Step 1: Total balls = 5 red + 3 blue = 8 balls. Step 2: Favourable outcomes (red balls) = 5. Step 3: Apply P(red) = 5/8 = 0.625. Answer: 5/8 or 0.625
What is the probability of an impossible event? Give an example with calculation.
Answer
Probability of impossible event = 0. Example: Getting number 7 on a standard die. Step 1: Total outcomes = {1,2,3,4,5,6} = 6. Step 2: Favourable outcomes for getting 7 = 0 (impossible). Step 3: P(gett
What is the probability of a certain event? Give an example with calculation.
Answer
Probability of certain event = 1. Example: Getting a number less than 7 on a die. Step 1: Total outcomes = {1,2,3,4,5,6} = 6. Step 2: Favourable outcomes (numbers < 7) = {1,2,3,4,5,6} = 6. Step 3: P(n
Two coins are tossed simultaneously. Find the probability of getting at least one head.
Answer
Step 1: Total outcomes = {HH, HT, TH, TT} = 4. Step 2: Favourable outcomes (at least one head) = {HH, HT, TH} = 3. Step 3: P(at least one head) = 3/4 = 0.75. Alternative: P(at least one head) = 1 - P(
A die is thrown. Find the probability of getting a prime number.
Answer
Step 1: Total outcomes = {1, 2, 3, 4, 5, 6} = 6. Step 2: Identify prime numbers from 1-6: {2, 3, 5} = 3 outcomes. (Note: 1 is not prime, 4 and 6 are composite). Step 3: P(prime) = 3/6 = 1/2 = 0.5. Ans
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What are the important topics in Probability for CBSE Class 10 Mathematics?
Probability covers several key topics that are frequently asked in CBSE Class 10 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
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Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision before the exam.
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There are 20 flashcards for Probability covering key definitions, formulas, and concepts. Use them daily for 10–15 minutes for best results.
Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
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