TEAS Math · Practice Question

    Probability: TEAS Practice Question with Answer & Explanation

    An original TEAS 7-style math practice question, written for nursing-school applicants — with a full breakdown of every answer choice.

    Question

    A bag has 3 red, 5 blue, and 2 green marbles. What is the probability of selecting a green marble?

    • A.1/10
    • B.1/5
      Correct
    • C.1/3
    • D.1/2

    Correct answer: B. There are 2 green marbles out of 10 total, so the probability is 2/10 = 1/5.

    Why B is correct

    There are 2 green marbles out of 10 total, so the probability is 2/10 = 1/5.

    How to solve this TEAS question

    Identify what the question is testing, eliminate choices that conflict with the relevant rule or evidence, and then select the option that directly answers the prompt.

    Review the alternatives

    The other choices do not satisfy the scientific fact, mathematical operation, language rule, or reading evidence tested by this question. Always compare each option with the exact wording of the prompt before deciding.

    Quick study tip: Probability is favorable outcomes over total outcomes.

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