Probability — Flashcards
ICSE · Class 8 · Mathematics
25 flashcards for Probability (ICSE Class 8 Mathematics) to test yourself on key terms and facts. Sample: "Solve: A coin is tossed once. What are"
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Solve: A coin is tossed once. What are the possible outcomes?
Answer
Step 1: A coin has two possible outcomes. Step 2: Write them clearly. Outcomes are: Head (H) and tail (T). Answer: H, T…
Solve: A coin is tossed two times. Write all possible outcomes.
Answer
Step 1: List the outcome for the first toss and second toss. Step 2: Combine them in order. Outcomes are: HH, HT, TH and TT. Answer: 4 outcomes…
Solve: A coin is tossed three times. How many possible outcomes are there?
Answer
Step 1: Each toss has 2 outcomes. Step 2: For 3 tosses, total outcomes = 2 × 2 × 2. Step 3: 2 × 2 × 2 = 8. Answer: 8 possible outcomes…
Solve: A die is thrown once. Write all possible outcomes.
Answer
Step 1: A die has six faces. Step 2: Write the numbers on the faces. Outcomes are: 1, 2, 3, 4, 5 and 6. Answer: 6 outcomes…
Solve: A die is thrown twice. How many ordered outcomes are possible?
Answer
Step 1: First throw has 6 outcomes. Step 2: Second throw also has 6 outcomes. Step 3: Total ordered outcomes = 6 × 6. Step 4: 6 × 6 = 36. Answer: 36 ordered outcomes…
What is the difference between an experiment and a trial?
Answer
An experiment is the overall action with well defined outcomes. A trial is each single performance of that experiment. Example: Tossing a coin is the experiment; each toss is a trial.
Why is tossing a coin a random experiment?
Answer
A random experiment has more than one possible outcome, and the exact outcome cannot be predicted in advance. For a coin toss, the possible outcomes are head and tail, but the next result cannot be kn…
Solve: When two coins are tossed together, what is the total number of possible outcomes?
Answer
Step 1: List all outcomes. Step 2: HH, HT, TH and TT. Step 3: Count them. Answer: 4 possible outcomes…
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