CBSE 11TH MATHEMATICS - Online Test
Q1. The mean and S.D. of 1,2,3,4,5,6 is
Answer : Option C
Explaination / Solution:
Q2. Three points A , B and C are collinear if the area of triangle ABC is
Answer : Option D
Explaination / Solution:
Only non collinear points can form a triangle. Hence if the three points are collinear a triangle cannot be formed, hence the area of the triangle is zero
Q3. Let p and q be two propositions. Then the contrapositive of the implication p→q is
Answer : Option A
Explaination / Solution:
The contrapositive of p→q≡∼q→∼p
Q4. The locus of a variable point whose distance from the point ( 2, 0) is times its distance from the line is
Answer : Option A
Explaination / Solution:
Let the point be (x,y)
Hence (x-2)2 + (y-0)2 =
(x- 2)2 + y2 = (x - 9/2)
On simplifying we get the equation of an ellipse
Q5. In a triangle ABC, if a, b, c are in A. P., then tan are in
Answer : Option A
Explaination / Solution:
Q6. The nth terms of the series 4+14+30+52+80+114+….. is =
Answer : Option B
Explaination / Solution:
When n = 1 we get 3. When n = 2 we get 12+2= 14...
Q7. Three prizes are distributed among three persons at random. The chances that none of the persons gets all the prizes is
Answer : Option B
Explaination / Solution:
No Explaination.
Q8. The equation 
represents
represents
Answer : Option B
Explaination / Solution:
The equation 
which represent generally YZ plane i.e. X=0 plane
which represent generally YZ plane i.e. X=0 plane
Q9. The number of ways, in which a student can choose 5 courses out of 8 courses, when 2 courses are compulsory, is
Answer : Option B
Explaination / Solution:
Total number of courses available=8
Number of courses which are not compulsary=8-2=6
Since two courses are compulsory a student can choose them in different ways.
The remaining 3 courses can be chosen from the 6 non-compulsory courses in
Therefore total number of ways=.=
Q10. The complex number z which satisfies lies on
Answer : Option C
Explaination / Solution:
which is the X-axis.
