1
AIEEE 2012
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
The negation of the statement “If I become a teacher, then I will open a school” is :
A
I will become a teacher and I will not open a school
B
Either I will not become a teacher or I will not open a school
C
Neither I will become a teacher nor I will open a school
D
I will not become a teacher or I will open a school
2
AIEEE 2012
MCQ (Single Correct Answer)
+4
-1
Let x1, x2,........., xn be n observations, and let $$\overline x $$ be their arithematic mean and $${\sigma ^2}$$ be their variance.

Statement 1 : Variance of 2x1, 2x2,......., 2xn is 4$${\sigma ^2}$$.
Statement 2 : : Arithmetic mean of 2x1, 2x2,......, 2xn is 4$$\overline x $$.
A
Statement 1 is false, statement 2 is true
B
Statement 1 is true, statement 2 is true; statement 2 is a correct explanation for statement 1
C
Statement 1 is true, statement 2 is true; statement 2 is not a correct explanation for statement 1
D
Statement 1 is true, statement 2 is false
3
AIEEE 2012
MCQ (Single Correct Answer)
+4
-1
Let X = {1, 2, 3, 4, 5}. The number of different ordered pairs (Y, Z) that can be formed such that Y $$ \subseteq $$ X, Z $$ \subseteq $$ X and Y $$ \cap $$ Z is empty, is :
A
35
B
25
C
53
D
52
4
AIEEE 2012
MCQ (Single Correct Answer)
+4
-1
Change Language
Resistance of a given wire is obtained by measuring the current flowing in it and the voltage difference applied across it. If the percentage errors in the measurement of the current and the voltage difference are 3% each, then error in the value of resistance of the wire is
A
6 %
B
zero
C
1 %
D
3 %
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