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WBJEE Probability & Statistics — practice questions — page 5

Explore 138 free Probability & Statistics questions in WBJEE Mathematics. Open each question or exercise to read its content, reference answers and available explanation.

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Probability & Statistics questions and exercises with answers

Showing questions 121–138 of 138.

Spot the one that does not belongRead the answer and worked solution →Tap every correct identityRead the answer and worked solution →Radians and degreesRead the answer and worked solution →True or false: reading the identitiesRead the answer and worked solution →Positive or negative angleRead the answer and worked solution →Which ratios are positiveRead the answer and worked solution →Type the trig functionRead the answer and worked solution →Pop what is defined everywhereRead the answer and worked solution →Which unit of angleRead the answer and worked solution →One word is wrongRead the answer and worked solution →Order the build upRead the answer and worked solution →Sine and cosineRead the answer and worked solution →Which one does not belongRead the answer and worked solution →Which way does it turnRead the answer and worked solution →Spot the false statementRead the answer and worked solution →Which ones belongRead the answer and worked solution →Knock out the true statementsRead the answer and worked solution →Trigonometry bingoRead the answer and worked solution →

Worked practice questions

Spot the one that does not belong

Read exercise and reference answers
Questions
  1. Items
    1. l = rθ
    2. cos²x + sin²x = 1
    3. 1 + tan²x = sec²x
    Odd item
    l = rθ
  2. Items
    1. sin(−x) = −sin x
    2. l = rθ
    3. cos(−x) = cos x
    Odd item
    l = rθ
  3. Items
    1. Radian
    2. Degree
    3. Slope
    Odd item
    Slope
Grouped by which summary bullet each comes from. Source: syllabus Maths, Ch 3 Trigonometric Functions.

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Tap every correct identity

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Questions
  1. Items
    1. Text
      cos²x + sin²x = 1
      Matches the category
      Yes
    2. Text
      1 + tan²x = sec²x
      Matches the category
      Yes
    3. Text
      1 + cot²x = cosec²x
      Matches the category
      Yes
    4. Text
      sin²x − cos²x = 1
      Matches the category
      No
    5. Text
      1 − tan²x = sec²x
      Matches the category
      No
    Category
    A correct identity from this chapter
Correct ones mixed with plausible wrong ones. Source: syllabus Maths, Ch 3 Trigonometric Functions.

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Radians and degrees

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Questions
  1. Question
    π radians in degrees is
    Choices
    1. 180
    2. 90
    3. 360
    Correct choice
    180
  2. Question
    2π radians in degrees is
    Choices
    1. 180
    2. 360
    3. 720
    Correct choice
    360
  3. Question
    90 degrees in radians is
    Choices
    1. π
    2. π/4
    3. π/2
    Correct choice
    π/2
  4. Question
    To go from degrees to radians, multiply by
    Choices
    1. π/180
    2. 180/π
    3. π
    Correct choice
    π/180
Converting in both directions. Source: syllabus Maths, Ch 3 Trigonometric Functions.

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