How many 2-item combinations can be formed from 4 distinct items?

Study for the Logical Reasoning STEM Test. Practice with flashcards and multiple-choice questions, each with hints and explanations. Prepare for success!

Multiple Choice

How many 2-item combinations can be formed from 4 distinct items?

Explanation:
Choosing 2 items from 4 when order doesn’t matter is a combinations problem. The number of such pairs is given by "4 choose 2," which equals 4! / (2! 2!) = (4 × 3) / 2 = 6. That yields the six unique pairs: (1,2), (1,3), (1,4), (2,3), (2,4), (3,4).

Choosing 2 items from 4 when order doesn’t matter is a combinations problem. The number of such pairs is given by "4 choose 2," which equals 4! / (2! 2!) = (4 × 3) / 2 = 6. That yields the six unique pairs: (1,2), (1,3), (1,4), (2,3), (2,4), (3,4).

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