Probability — Basic Understanding Part A2
Probability — Basic Understanding Part A2. Continue practicing foundational probability concepts: basic calculations, events, and first probability rules.
A bag contains 2 red and 3 blue balls. 🎒
What is the probability of drawing a red ball?
Explanation: Total = 5. P(red) = 2/5.
A bag contains 1 red and 3 blue balls. 🎒
What is the probability of drawing the red ball?
Explanation: Total = 4. P(red) = 1/4.
A bag contains 4 red and 1 blue ball. 🎒
What is the probability of drawing a red ball?
Explanation: Total = 5. P(red) = 4/5.
A box contains 3 green and 3 yellow balls. 🎁
What is the probability of drawing a green ball?
Explanation: Equal numbers of each colour → P(green) = 3/6 = 1/2.
A bag has 2 green, 1 red and 2 blue balls. 🎒
What is the probability of drawing a blue ball?
Explanation: Total = 5. P(green) = 2/5.
A bag contains 4 red and 6 blue balls. 🎒
What is the probability of drawing a red ball?
Explanation: Total = 10. P(red) = 4/10.
A box has cards numbered 1–8. What is the probability of drawing a number greater than 6? 📄
Explanation: Numbers greater than 6: 7 and 8 — two out of 8. P = 2/8.
A fair coin is tossed. 🌕🌑
What is the probability of heads?
Explanation: A coin has 2 equally likely sides. P(heads) = 1/2.
A fair die (1–6) is rolled. 🎲
What is the probability of rolling the number 5?
Explanation: 6 equally likely faces; only one is 4. P = 1/6.
A fair die is rolled. 🎲
What is the probability of rolling an even number?
Explanation: Even: 2, 4, 6 — three out of 6. P = 1/2.
A bag has 3 red, 2 green and 1 blue ball. 🎒
What is the probability of drawing a green ball?
Explanation: Total = 6. P(green) = 2/6 = 1/3.
A jar has 12 sweets: 5 strawberry and 7 chocolate. 🍬
What is the probability of drawing a strawberry sweet?
Explanation: Total = 12. P(strawberry) = 5/12.
A class has 15 students: 9 girls and 6 boys. 👩🎓👨🎓
What is the probability of randomly selecting a girl?
Explanation: Total = 15. P(girl) = 9/15.
4 face-down cards: 💖, 💖, 🔵, 🔵. One card is chosen at random. What is P(heart)?
Explanation: 2 hearts out of 4. P = 1/2.
A box has 3 circles ⚪, 1 square ⬜ and 2 triangles 🔺.
What is the probability of drawing a circle?
Explanation: Total = 6. P(circle) = 3/6 = 1/2.
A bag has 10 balls: 4 red, 4 blue and 2 green. 🎒
What is the probability of drawing a ball that is not green?
Explanation: Not green = 8 balls out of 10. P = 8/10 = 4/5.
Cards numbered 1–5. 📄
What is the probability of drawing an odd number?
Explanation: Odd: 1, 3, 5 — three out of 5. P = 3/5.
A cup has 7 pens: 2 black and 5 blue. 🖊️
What is the probability of drawing a blue pen?
Explanation: 5 blue pens out of 7. P = 5/7.
A bag has 10 balls: 3 red, 5 blue and 2 yellow. 🎒
What is the probability of drawing a yellow ball?
Explanation: 2 yellow out of 10. P = 2/10.
A bag has 4 differently coloured balls: red, blue, green and yellow. 🎨
What is the probability of drawing the red ball?
Explanation: 1 red out of 4. P = 1/4.
A box has 4 cards: 😀, 😀, 😀, 😢. What is the probability of drawing a happy card?
Explanation: 3 happy out of 4. P = 3/4.
A bag has 6 balls: 1 purple, 2 pink and 3 white. 🎒
What is the probability of drawing the purple ball?
Explanation: 1 purple out of 6. P = 1/6.
A box has 5 cards: 3 saying YES and 2 saying NO. 📝
What is P(YES)?
Explanation: 3 YES cards out of 5. P = 3/5.
A game has 10 tickets: 3 "Win" and 7 "Try again". 🎟️
What is P(Win)?
Explanation: 3 winning tickets out of 10. P = 3/10.
A bag has 1 red and 3 blue balls. 🎒
What is the probability of drawing a blue ball?
Explanation: Total = 4. P(blue) = 3/4.
A jar has 9 sweets: 3 red, 3 blue and 3 green. 🍬
What is P(red)?
Explanation: Equal distribution: P(red) = 3/9 = 1/3.
8 storage lockers numbered 1–8. 🔐
What is the probability of choosing a locker numbered 3 or 5?
Explanation: Two lockers (3 and 5) out of 8. P = 2/8.
A bowl has fruits: 🍎, 🍎, 🍌, 🍐. What is P(apple)?
Explanation: 2 apples out of 4. P = 2/4 = 1/2.
A day of the week is chosen at random. 📅
What is the probability of choosing Sunday?
Explanation: 1 Sunday out of 7 days. P = 1/7.
A letter is chosen from the word "MATIMATIKA" (7 letters). 🔡
The word has 2 letters M and one each of A, T, I, K.
What is the probability of choosing the letter M?
Explanation: The word MATHEMATICS has 11 letters; M appears twice. P = 2/11.