R-SAT Exam

What is the value of 11! + 22! + 3!3! + ............ nn!, where n! means n factorial or n(n-1)(n-2)...1
A. (n+1)! B. (n+1)! - 1! C. (n+1)!* 1!

Read Solution (Total 2)

(n+1)!-1
so ans=b
10 years agoHelpfull: Yes(1) No(3)

b upto 3 terms its 4!-1 so upto n*n! terms it will be (n+1)1-1 so option b
9 years agoHelpfull: Yes(0) No(0)

R-SAT Other Question

The principal wants to arrange 5 students on the platform such that the boy Shyam occupies the second position and such that the girl Geetha is always adjacent to the girl Anitha. How many such arrangements are possible?
option
A. None
B. 7!*5!
C. 3!*5!
D. 3!*7!
E. 3!*2!
This question is based on the following information. Children in a class play only one or two or all the three games hockey, tennis and cricket.10 children play only cricket,16 children play only hockey, 14 children play only tennis ,6 children play only two games hockey and tennis,8 children play only two games cricket and hockey and 8 children play only two games tennis and cricket.4 children play all the three games. In how many children play hockey?
option
A. 16
B. 25
C. 30
D. 34
E. None Of These