Probability functions and cumulative distribution functions

Probability functions and cumulative distribution functions Quiz

Spec 5.1–2 · Edexcel International A Level Maths: Quiz

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  1. 1. P(X=x)=kxP(X=x)=kx for x=1,2,3x=1,2,3. Find kk.

    • A. 13\frac13
    • B. 16\frac16
    • C. 66
    • D. 12\frac12

  2. 2. XX takes values 0, 1, 2 with probabilities 0.5, 0.3, 0.2. Find F(1)F(1).

    • A. 0.30.3
    • B. 0.20.2
    • C. 0.50.5
    • D. 0.80.8

  3. 3. F(2)=0.4F(2)=0.4 and F(3)=0.7F(3)=0.7 for a variable taking whole values. Find P(X=3)P(X=3).

    • A. 0.30.3
    • B. 0.70.7
    • C. 0.280.28
    • D. 0.40.4

  4. 4. F(3)=0.6F(3)=0.6 for a variable taking values 1 to 5. Find P(X>3)P(X>3).

    • A. 0.60.6
    • B. 0.30.3
    • C. 1.61.6
    • D. 0.40.4

  5. 5. A fair die is rolled and XX is the score. Find F(4.5)F(4.5).

    • A. 56\frac56
    • B. 23\frac23
    • C. 12\frac12
    • D. 4.56\frac{4.5}{6}

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