CAT Exam

In how many ways we can arrange letters from A to Z, when A and I can have only seven letters between them?

Read Solution (Total 5)

= 24C7 * 7! * 2! * 17!
11 years agoHelpfull: Yes(5) No(3)

24c7*7!*2!*7!
11 years agoHelpfull: Yes(0) No(1)
ans is 26 ! since in between A AND I 7 letters are present. and the 2nd statement is only given to confuse the student. there are 26 letters in english alphabates .so it can be arranged in 26! ways
11 years agoHelpfull: Yes(0) No(8)
@ vinay:-why 2 is used here????
11 years agoHelpfull: Yes(0) No(2)
2!*24C7*17!*18!=36!*24!
10 years agoHelpfull: Yes(0) No(1)

CAT Other Question

(a/b)^x-1 = (b/a)^x-3

then the value of x? A plane is divided into 79 regions by several number of straight lines. How many number of lines is required atleast for this division?