Combined & Conditional Probability

Combined & Conditional Probability Quiz

Spec 6.3 · Edexcel IGCSE Maths: Quiz

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5 questions, one answer each

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  1. 1. A coin is flipped and a die is rolled. What is P(heads and rolling a 6)?

    • A. 112\frac{1}{12}
    • B. 18\frac{1}{8}
    • C. 712\frac{7}{12}
    • D. 16\frac{1}{6}

  2. 2. A card is drawn from a standard 52-card deck. What is P(drawing a Jack or a Queen)?

    • A. 452\frac{4}{52}
    • B. 1652\frac{16}{52}
    • C. 852\frac{8}{52}
    • D. 252\frac{2}{52}

  3. 3. A bag has 4 red and 2 blue counters. One is drawn and NOT replaced, then a second is drawn. What is P(both red)?

    • A. 1636\frac{16}{36}
    • B. 1230\frac{12}{30}
    • C. 46×36\frac{4}{6} \times \frac{3}{6}
    • D. 25\frac{2}{5}

  4. 4. In a class of 50 students, 30 are girls. Of the girls, 18 study Spanish. Of the 20 boys, 8 study Spanish. Given a student studies Spanish, what is P(the student is a girl)?

    • A. 1830\frac{18}{30}
    • B. 1850\frac{18}{50}
    • C. 1826\frac{18}{26}
    • D. 1820\frac{18}{20}

  5. 5. A box has 3 green, 4 yellow, and 5 red balls (12 total). Two balls are drawn without replacement. What is P(first is green and second is yellow)?

    • A. 312×412\frac{3}{12} \times \frac{4}{12}
    • B. 312×411\frac{3}{12} \times \frac{4}{11}
    • C. 311×412\frac{3}{11} \times \frac{4}{12}
    • D. 412×311\frac{4}{12} \times \frac{3}{11}

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