CBSE 11TH MATHEMATICS - Online Test
Q1. The product of three consecutive natural numbers is divisible by
Answer : Option D
Explaination / Solution:
By replacing n by 1 we get 6.
Q2. The letters of the word ‘ MALENKOV ‘are arranged in all possible ways. The chance that there are exactly four letters between M and E is
Answer : Option D
Explaination / Solution:
No Explaination.
Q3. A sphere through three non – collinear points A, B, and C is smallest when its centre is
Answer : Option B
Explaination / Solution:
No Explaination.
Q4. The number of ways, in which a student can select one or more questions out of 12 each having an alternative, is
Answer : Option B
Explaination / Solution:
Since a student can solve each question in 3 different ways - either he can attempt the first alternative ,or the second alternative or he can leave it unanswered.
Hence number of ways in which a student can attempt one or more of the 12 given questions =
Now we can consider a case that the student leave all the 12 given questions unanswered.
The number of ways, in which a student can select one or more questions out of 12 each having an alternative=
Q5. is
Answer : Option B
Explaination / Solution:
Q6. The coefficients of in the expansion of , where n is an even integer is
Answer : Option D
Explaination / Solution:
Q7. If a set A has n elements then the total number of subsets of A is
Answer : Option C
Explaination / Solution:
The total no of subsets=2n
Q9.
The solution set of the inequation:
Answer : Option C
Explaination / Solution:
[ Multiply the inequality throughout by the L.C.M]
, but given
Hence the solution set will be nullset.
Q10. The fourth term of a G. P. is 2, then product of first 7 terms is
Answer : Option B
Explaination / Solution:
