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Probability measures how likely something is, as a fraction from 0 to 1. List the equally likely outcomes, count the ones you want, and divide. Olympiad options include the classic slips: comparing favourable with unfavourable, or treating “0, 1 or 2 heads” as equally likely.
✓ You passed this topic’s test.
Favourable over total — “count what you want, count everything, divide”
Use it for: Dice, coin, card-free bag and spinner questions in Class 7–10 papers and the probability chapter.
Check: Red 3/10 + green 5/10 + blue 2/10 = 10/10 = 1 — all the chances add up to 1 ✓
Work it out in your head or on paper, type the answer and press Check. Stuck? Press “Show me how”.
Right: 0 · Tried: 0
20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.
🏅 Sign in with Google to earn the 🎲 Dice Master badge when you pass — and a certificate when you finish all 13 topics of Part 4 · Class 5–10 problem solving. You can still take the test without signing in.
Why does it work? When should you use it? Ask in English, मराठी or हिंदी.
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