The arithmetic mean and standard deviation of series of 20 items were calculated by a student as 20 cm and 5 cm respectively. But while calculating them an item 15 was misread as 30. Find the correct standard deviation.
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The arithmetic means of two observations is 125 and their geometric mean is 60.
Find the harmonic mean of the two obser…
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In a class there are 400 students, the following table shows the number of students
studying one or more of the subject…
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Which of the following storage hardwares can be used as a back-up device?A. HDD B. ROM C. RAM D. Cache&n…
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Given below are two statements: one is labelled as Assertion A and the other is
labelled as Reason R. Assertion A …
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Consider the diagram given below and the following two statements: Statement I: Regions X, Y and Z can be expresse…
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Given below are two statements: one is labelled as Assertion A and the other is
labelled as Reason R. Assertion A …
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Given below are two statements: Statement I: 011010 is 2's complement representation of -37. Statement II: 11…
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Given below are two statements: one is labelled as Assertion A and the other is
labelled as Reason R Assertion A :…
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Match the listLIST 1 LIST 2A. If 4th term of a G.P. is square of its second term, and its first term is 3, then co…
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Universities in India are preferring traditional attire during convocations.A. Indian Universities are against Western …
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In a processor, while executing an instruction A. Programme Counter is used to hold the address of next instructio…
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Given the marks of 25 students in the class as $\{m_1,m_2,m_3,..m_{25}\}$. Marks lie in the
range of [1-100] and $\over…
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India has been continuously experiencing military threats from its neighbouring
countries. Statement I: India shou…
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A + B means A is daughter of B A x B means A is son of B A -B means A is the wife of B P x Q-S means&nbs…
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The terms $1,\, \log _y(x),\, \log _z(y)\, and\, 15\log _x(z)$ are in AP.Based on this information answer the following…
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The terms $1,\, \log _y(x),\, \log _z(y)\, and\, 15\log _x(z)$ are in AP.Based on this information answer the following…
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The terms $1,\, \log _y(x),\, \log _z(y)\, and\, 15\log _x(z)$ are in AP.Based on this information answer the foll…
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Consider n events ${{E}}_1,{{E}}_2\ldots{{E}}_n$ with respective probabilities ${{p}}_1,{{p}}_2\ldots{{p}}_n$. If …
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Given a set of events ${{E}}_1,{{E}}_2\ldots{{E}}_n$ defined on the sample space S such that :(i) $\forall\, i\, a…
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Given the following statement and five possible conclusions.All scientists working in America are talented. Some I…
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