CTS
Company
Numerical Ability
Permutation and Combination
Q. How many different two-letter initials with none of the letters repeated can people have?
Option
A) 550
B) 650
C) 750
D) 950
Read Solution (Total 8)
-
- ways to fill two letters __ __
no. of ways to fill first = 26 (A to Z)
no. of ways to fill second= 25 (without repeatation)
total ways to fill these two = 26*25 = 650 - 10 years agoHelpfull: Yes(41) No(0)
- ans:650
26*25=650 - 10 years agoHelpfull: Yes(4) No(0)
- first letter=26 letter available
for second letter =25 available so...26*25=650 - 10 years agoHelpfull: Yes(2) No(0)
- 26c1*25=650,without repetation,and with is 26*26=676.
- 10 years agoHelpfull: Yes(0) No(7)
- for first latter it has 26 way
and for 2 latter it has 25 way
hence 25*26=650 - 9 years agoHelpfull: Yes(0) No(0)
- way to fill first letter =26
2nd =25
total combination=650=26*25 - 9 years agoHelpfull: Yes(0) No(0)
- i think 650
- 9 years agoHelpfull: Yes(0) No(0)
- B
(26C1 * 25C1) - 5 years agoHelpfull: Yes(0) No(0)
CTS Other Question
Q. What would be the local minimum for the function represented as f(x,y) = x2 +ay+y2 -3x ?
Option
A) (1,1)
B) (2,-1)
C) (-1,1)
D) (2,2)
Q. The quantity y varies directly as xn . For x = 3, 4, 5 and 6, the corresponding values of y are 40.5, 96, 187.5 and 324. Find n:?
Option
A) 2
B) 2.5
C) 3
D) 3.5