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#2981
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Random Variable
Let X and Y are two random variables with E(X)=10,E(Y)=20 and Var(X)=25,Var(Y)=36 and E(X.Y)=225.Now consider Z=aX-bY+1.Find a and b when E(Z)=1 and Var(Z)=1.
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#2982
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Uppcl 2018
what could be the eigen values of a 2*2 Matrix if all its elements are intergers.
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#2983
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ME ots 1
I think they asked something different and expected something different." not all vowels together "and "no vowels together" has totally different meaning and they calculate the later one and expected former one.
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#2984
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raman classes
consider a collection of 20 balls,where each ball has unique number printed on it from 1-20.if we take out 8 balls from this collection at random,then the expected value of sum of numbers printed on these 8 balls is ______??
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#2985
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raman classes test series
number of ways of arranging the letters GGGGGAAATTTECCS such that no two T's are together?
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#2986
5.3k
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1 answers
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UGC NET CSE | December 2018 | Part 2 | Question: 1
In mathematical logic, which of the following are statements?There will be snow in January.What is the time now?Today is Sunday.You must study Discrete ... correct answer from the code given below:i and iiii and iiii and iviii and iv
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#2987
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UGC NET CSE | December 2018 | Part 2 | Question: 2
Match List-I with List-II and choose the correct answer from the code given below : ... -(ii), (d)-(i)(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
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#2988
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UGC NET CSE | December 2018 | Part 2 | Question: 3
A box contains six red balls and four green balls. Four balls are selected at random from the box. What is the probability that two of the selected balls will be red and two will be ... $\frac{3}{7}$\frac{1}{35}$\frac{1}{9}$
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#2989
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UGC NET CSE | December 2018 | Part 2 | Question: 33
The number of substrings that can be formed from string given by$a \: d \: e \: f \: b \: g \: h \: n \: m \: p$is$10$45$55$56$
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#2990
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UGC NET CSE | December 2018 | Part 2 | Question: 100
A full joint distribution for the Toothache, Cavity and Catch is given in the table below. Toothache$\neg$ ToothacheCatch$\neg$ CatchCatch$\neg$ CatchCavity$0.108$0.012$0.072$0 ... $\langle 0.6, 0.4\rangle$
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#2991
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raman classes test series
suppose that X is a random variable for which E(X)=$\mu$ and Var(X)=$\sigma^{2}$.let c be an arbitrary constantthen E[$\ (X-c)^{2}$]=_______?
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#2992
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Clarification on Topic
In the syllabus it was said “differentiability” does this mean we have partial differentiation.??
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#2993
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self doubt
If A = {1,2,3 …. n}then how many multisets of size 4 are possible ,such that atleast of the elements appears twice.
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#2994
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Determine whether the relation is reflexive, symmetric, and/or transitive?
Let R be the relation on the set N' of strictly positive integers, where strictly positive integers x and y satisfy x R y iffx^2 - y^2 = 2^kfor ... with respect to R? I think it's just reflexive, because it obeys reflexive conditions.
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#2995
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self doubt
In an undirected graph a self loop counts to how many edges?I read somewhere that in case of undirected graph we consider self loop to have 2 edges?
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#2996
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2 answers
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Gateforum Test Series: Graph Theory - Graph Matching
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#2997
670
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2 answers
1 votes
Zeal Test Series 2019: Set Theory & Algebra - Relations
The Number of Relations, Which are both Reflexive and Symmetric but not Anti-Symmetric, on aset with 6 elements, are ____________?i got 32768 plz check
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#2998
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Zeal Test Series 2019: Graph Theory - Degree Of Graph
A simple graph is one in which there are no self loops and each pair of distinct vertices is connected by at most one edge. Let G be a simple graph on 8 ... of degree 7. Which of the following can be the degree of the last vertex ____ ?
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#2999
369
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Q30 dicrete made easy 2018
number of ways possible to form injective function from set A to setB where |A|=3 and |B|=5 where the pth element of set A cannot match with pth element of set B?
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#3000
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Gateforum Test Series
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