4.5 Basic probability

4.5 Basic probability Quiz

IB Maths: Analysis and Approaches SL: Quiz

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5 questions, one answer each

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  1. 1. A letter is chosen at random from the word PROBABILITY. Find P(it is a B).

    • A. 111\frac{1}{11}
    • B. 211\frac{2}{11}
    • C. 29\frac{2}{9}
    • D. 15\frac{1}{5}

  2. 2. Two fair dice are rolled. Find P(the total is 7).

    • A. 111\frac{1}{11}
    • B. 112\frac{1}{12}
    • C. 16\frac{1}{6}
    • D. 736\frac{7}{36}

  3. 3. A spinner lands on blue 18 times in 60 spins. Estimate the number of blues in 250 spins.

    • A. 18
    • B. 75
    • C. 72
    • D. 90

  4. 4. The probability it rains on a given day is 0.15. Find the probability it does not rain.

    • A. 0.15
    • B. 0.75
    • C. 0.85
    • D. 1.15

  5. 5. A card is chosen from cards numbered 1 to 20. Find P(the number is a multiple of 3).

    • A. 13\frac{1}{3}
    • B. 310\frac{3}{10}
    • C. 720\frac{7}{20}
    • D. 619\frac{6}{19}

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