1
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

The letters of the word "COCHIN" are permuted and all the permutations are arranged in alphabetical order as in an English dictionary. The number of words that appear before the word "COCHIN" is

A
48
B
96
C
192
D
360
2
COMEDK 2024 Morning Shift
MCQ (Single Correct Answer)
+1
-0

In how many ways can the word "CHRISTMAS" be arranged so that the letters '$$\mathrm{C}$$' and '$$\mathrm{M}$$' are never adjacent?

A
$$8!\times \frac{9}{2}$$
B
$$8!\times \frac{7}{2}$$
C
$$7!\times \frac{9}{2}$$
D
$$9!\times \frac{7}{2}$$
3
COMEDK 2024 Morning Shift
MCQ (Single Correct Answer)
+1
-0

If $$\left[{ }^{n+1} C_{r+1}\right]:\left[{ }^n C_r\right]:\left[{ }^{n-1} C_{r-1}\right]=11: 6: 3$$ then $$n r=$$

A
30
B
40
C
20
D
50
4
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0

$$\text { Find }{ }^n C_{21} \text {, if }{ }^n C_{10}={ }^n C_{12}$$

A
1
B
21
C
22
D
2
COMEDK Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
CBSE
Class 12