CBSE 11TH MATHEMATICS - Online Test
Q1.
The middle term in the expansion of is
Answer : Option D
Explaination / Solution:
Q2. If A and B are sets , then A ∩ ( B – A ) is
Answer : Option C
Explaination / Solution:
Q4. Solve the system of inequalities :
Answer : Option C
Explaination / Solution:
Hence the solution of the system will be
Q5. If a, b, c, d are in H.P., then ab + bc + cd is
Answer : Option D
Explaination / Solution:
using the property of H.M
multiplying the above equations, we get
now dividing by bc,
Q6. If the variance of the data is V, then its S.D. is
Answer : Option D
Explaination / Solution:
standard deviation have the same units as the data but variance is mean of the square of differences.
Q7. If the points representing the complex numbers - 4 +3i , 2 – 3i and 0 + pi are collinear , then the value of p is
Answer : Option A
Explaination / Solution:
Let us take the coordinates as (-4,3), (2,-3) and (0,p).
If the points are collienear the |x1(y2 - y3) + x2(y3 - y1) + x3(y1-y2)| = 0
Now substituting the values |-4(-3 - p) +2(p -3) +0(3+3)|= 0
12 +4p +2p -6 +0 = 0
6p +6 = 0
6p = -6
Therefore p = -1
Q8. The contrapositive of p→(∼q→∼r) is
Answer : Option B
Explaination / Solution:
The contrapositive of p→q is ∼q→∼p
Q9.
The line y = m x + c is a normal to the circle
Answer : Option A
Explaination / Solution:
has center (-g,-f)
As normal passes through center so center will satisfy the equation of normal
put y=-f and x=-g in equation of the line y=mx+c
-f = m(-g) +c
which gives mg =f+c.
Q10. The maximum value of sin in the interval is attained at
Answer : Option D
Explaination / Solution:
