Probability
ICSE · Class 10 · Mathematics
Flashcards for Probability — ICSE Class 10 Mathematics. Quick Q&A cards covering key concepts, definitions, and formulas.
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Get startedA coin is tossed once. Find the sample space and the probability of getting a head.
Answer
Step 1: The sample space is S = {H, T}. Step 2: Favourable cases for getting a head = 1. Step 3: Total number of cases = 2. Step 4: Use the formula: Probability of an event = Number of favourable case…
A die is thrown once. Find the sample space and the probability of getting an even number.
Answer
Step 1: The sample space is S = {1, 2, 3, 4, 5, 6}. Step 2: Even numbers are 2, 4, and 6. Step 3: Favourable cases = 3. Step 4: Total cases = 6. Step 5: P(even number) = 3/6 = 1/2. Answer: S = {1, 2, …
A die is thrown once. Find the probability of getting a number greater than 6.
Answer
Step 1: The sample space is S = {1, 2, 3, 4, 5, 6}. Step 2: There is no number greater than 6 in the sample space. Step 3: Favourable cases = 0. Step 4: Total cases = 6. Step 5: P(number greater than …
A coin is tossed 3 times. How many outcomes are in the sample space?
Answer
Step 1: Each toss has 2 outcomes: H or T. Step 2: For 3 tosses, use n(S) = 2^3. Step 3: n(S) = 8. Answer: The sample space has 8 outcomes.
A coin is tossed 3 times. Find the probability of getting exactly 2 heads.
Answer
Step 1: The sample space has 8 outcomes. Step 2: The outcomes with exactly 2 heads are HHT, HTH, and THH. Step 3: Favourable cases = 3. Step 4: Total cases = 8. Step 5: P(exactly 2 heads) = 3/8. Answe…
A coin is tossed 2 times. Which event is a simple event: getting HT or getting a head on the first coin?
Answer
Step 1: A simple event has only one outcome. Step 2: Getting HT has one sample point, so it is a simple event. Step 3: Getting a head on the first coin includes HH and HT, so it has two sample points.
A pack of cards has 52 cards. How many red cards and black cards are there?
Answer
Step 1: A pack of playing cards has 52 cards in all. Step 2: It has 2 colours. Step 3: Red cards = 26. Step 4: Black cards = 26. Answer: There are 26 red cards and 26 black cards.
How many suits are there in a pack of playing cards? Also, what do A, J, Q, and K represent?
Answer
Step 1: A pack of cards has 4 suits. Step 2: A, J, Q, and K represent 1, 11, 12, and 13 respectively. Step 3: There are 4 cards of the same number in a pack. Answer: There are 4 suits, and A, J, Q, K …
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