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Quantitative Reasoning: Probability Flashcards

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

Read the first 7 Quantitative Reasoning: Probability flashcards as text

  1. How many ways can 4 different books be arranged on a shelf?

    Answer: 24

    4! = 4 × 3 × 2 × 1 = 24 arrangements.

  2. From 6 people, how many ways can a committee of 2 be chosen?

    Answer: 15

    C(6,2) = 6!/(2!·4!) = 15.

  3. A coin is flipped 3 times. What is the probability of exactly two heads?

    Answer: 3/8

    Three of eight outcomes have exactly two heads, so 3/8.

  4. In how many ways can the letters of the word 'DAT' be arranged?

    Answer: 6

    Three distinct letters give 3! = 6 arrangements.

  5. A bag has 7 marbles. What is the probability of drawing a specific one in a single draw?

    Answer: 1/7

    One favorable outcome of 7 equals 1/7.

  6. How many three-digit codes can be made using digits 0–9 if repetition is allowed?

    Answer: 1000

    10 × 10 × 10 = 1000 possible codes.

  7. What is the probability of rolling a die and getting a multiple of 3?

    Answer: 1/3

    Multiples of 3 are 3 and 6, so 2/6 = 1/3.