Two coins flipped: what is the probability of exactly one head?

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

Multiple Choice

Two coins flipped: what is the probability of exactly one head?

Explanation:
Flipping two coins creates four equally likely outcome pairs: HH, HT, TH, TT. “Exactly one head” happens in the two cases HT and TH, so there are 2 favorable outcomes out of 4 total. Probability = 2/4 = 1/2 = 0.5. The other options don’t fit because 0.25 would require only one favorable outcome among four, 0.75 would be the chance of at least one head (not exactly one), and 0.0 isn’t possible with two flips.

Flipping two coins creates four equally likely outcome pairs: HH, HT, TH, TT. “Exactly one head” happens in the two cases HT and TH, so there are 2 favorable outcomes out of 4 total. Probability = 2/4 = 1/2 = 0.5.

The other options don’t fit because 0.25 would require only one favorable outcome among four, 0.75 would be the chance of at least one head (not exactly one), and 0.0 isn’t possible with two flips.

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