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Mathematics Proficiency Flashcards

7 cards from real NBT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Mathematics Proficiency flashcards as text

  1. The ages of five students are 14, 16, 15, 17, and 13. What is the mean age?

    Answer: 15

    Sum = 75; mean = 75 ÷ 5 = 15.

  2. A bag contains 4 red balls, 3 blue balls, and 3 green balls. What is the probability of picking a blue ball?

    Answer: 3/10

    Total balls = 10; P(blue) = 3/10.

  3. The data set {5, 7, 9, 11, 13} has a range of:

    Answer: 8

    Range = maximum − minimum = 13 − 5 = 8.

  4. What is the median of the data set {3, 7, 2, 9, 5}?

    Answer: 5

    Ordered: {2, 3, 5, 7, 9}; the middle value is 5.

  5. A survey of 50 students found that 60% prefer math over science. How many students prefer math?

    Answer: 30

    60% of 50 = 0.60 × 50 = 30 students.

  6. If two events A and B are mutually exclusive and P(A) = 0.3 and P(B) = 0.4, what is P(A or B)?

    Answer: 0.7

    For mutually exclusive events, P(A or B) = P(A) + P(B) = 0.3 + 0.4 = 0.7.

  7. The mode of the data set {4, 6, 4, 8, 9, 6, 4, 7} is:

    Answer: 4

    4 appears three times, more than any other value, so the mode is 4.