Elementary Mathematics || Quiz-18 || CDS

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Question 1

If the roots of the equation are reciprocal to each other, then which one of the following is correct?

• AP = 2r
• BP = r
• C2p = r
• DP = 4r

Question 2

The total number of live births in a specific locality during different months of a specific year was obtained from the office of the Birth Registrar. This set of data may be called

• APrimary data
• BSecondary data
• CRecorded data
• DCountable data

Question 3

The geometric mean of x and y is 6 and the geometric mean of x, y and z is also 6. Then the value of z is

• A12
• B
• C6
• D

Question 4

Frequency density of a class is computed by the ratio

• AClass frequency to the class width
• BClass frequency to total frequency
• CClass frequency to total number of classes
• DCumulative frequency up to that class to total frequency

Question 5

In a triangle ABC, ∠C = 90 ° and CD is the perpendicular from C to AB.
If , then which one of the following is correct?

• ABC.CD = AB.CA
  B. A
• BBC = CD.CA
• C
• DAB.CD = BC.CA

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