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12th Standard English Medium Maths Subject Probability Distributions Creative 1 Mark Questions with Solution Part - II

12th Standard

    Reg.No. :
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Maths

Time : 01:00:00 Hrs
Total Marks : 5

    1 Marks

    5 x 1 = 5
  1. If \(f(x)=\frac { 1 }{ 2 } \) ,\(E\left( { x }^{ 2 } \right) =\frac { 1 }{ 4 } \) then var(x) is _____________

    (a)

    0

    (b)

    \(\frac { 1 }{ 4 } \)

    (c)

    \(\frac { 1 }{ 2 } \)

    (d)

    1

  2. In a binomial distribution,\(n=4,P(X=0)=\frac { 16 }{ 81 } \),then \(P(X=4)\) _____________

    (a)

    \(\frac { 1 }{ 16 } \)

    (b)

    \(\frac { 1 }{ 81 } \)

    (c)

    \(\frac { 1 }{ 27 } \)

    (d)

    \(\frac { 1 }{ 8 } \)

  3. Var (2x ± 5) is =________

    (a)

    5

    (b)

    var (2x) ± 5

    (c)

    4 var (X)

    (d)

    0

  4. A coin is tossed 3 times. The probability of getting exactly 2 heads is________

    (a)

    \(\frac { 1 }{ 2 } \)

    (b)

    \(\frac { 1 }{ 8 } \)

    (c)

    \(\frac { 3 }{ 8 } \)

    (d)

    \(\frac { 1 }{ 4 } \)

  5. If the mean and S.D of a binomial distribution are 12 and 2 respectively, then ___________

    (a)

    npq = 4

    (b)

    \(q=\frac { 1 }{ 3 } \)

    (c)

    \(P=\frac { 2 }{ 3 } \)

    (d)

    \(pq=\frac { 1 }{ 9 } \)

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