Probability Word Problems for Formative Summative | MYP 1 - Free Printable

Let’s solve each problem step by step.

---

Problem 1:
You think of a number from two to eight. What is the probability that the number will be 5?

Step 1: List all possible numbers you can think of.
From 2 to 8 inclusive:
→ 2, 3, 4, 5, 6, 7, 8 → That’s 7 numbers total.

Step 2: How many of those are “5”?
→ Only one (just the number 5).

Step 3: Probability = (favorable outcomes) / (total possible outcomes)
→ 1 / 7

✔ Final Answer for Problem 1: 1/7

---

Problem 2:
Each letter in the word LOUVRE is on separate cards. Pick one at random. What’s the probability it’s L or O?

Step 1: Write out the letters in “LOUVRE”:
→ L, O, U, V, R, E → That’s 6 letters total.

Step 2: Which ones are L or O?
→ L and O → That’s 2 favorable letters.

Step 3: Probability = 2 / 6
Simplify: divide numerator and denominator by 2 → 1/3

✔ Final Answer for Problem 2: 1/3

---

Problem 3:
You roll a six-sided die. What’s the probability the roll is Six?

Step 1: A standard die has faces: 1, 2, 3, 4, 5, 6 → 6 total outcomes.

Step 2: Only one face is “Six” → 1 favorable outcome.

Step 3: Probability = 1 / 6

✔ Final Answer for Problem 3: 1/6

---

Problem 4:
Bag has 5 black, 7 red, 8 orange pencils. Pick one without looking. What’s the probability it’s black?

Step 1: Total pencils = 5 + 7 + 8 = 20 pencils

Step 2: Black pencils = 5

Step 3: Probability = 5 / 20
Simplify: divide numerator and denominator by 5 → 1/4

✔ Final Answer for Problem 4: 1/4

---

Final Answer:
1. 1/7
2. 1/3
3. 1/6
4. 1/4