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Counting and Basic Probability · Question 1 of 65

Question 1

EasyOriginal question

Tenzin packs 4 shirts, 3 pairs of trousers and 2 pairs of shoes for a trip. An outfit is one shirt, one pair of trousers and one pair of shoes. How many different outfits can he make?

Options for question 1

Show the answer and explanation
CorrectNot quiteAnswer D

Correct answer: D

Explanation

  1. Each choice is made independently, so multiply: 4×3×24 \times 3 \times 2.

  2. 4×3=124 \times 3 = 12, and 12×2=2412 \times 2 = 24 outfits.

Worth noting

9 comes from adding 4+3+24 + 3 + 2; addition is for choosing ONE item from several groups. 12 forgets the shoes.

Concept
Multiplication rule for independent choices
Typical time
40 s
Your time
—
The rule this testsThe counting principle
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