TCS
Company
An elevator starts with 5 person on board and goes up 5 floors...
What is the probability that all 5 passengers are on a different floor?
a>24/109
b>55/412
c>10/512
d>none of these
Read Solution (Total 9)
-
- ans is 5!/5^5
- 11 years agoHelpfull: Yes(26) No(3)
- there is one ruls (n!)/(n^f)
n=number of person
f=number of floor
thus(5!)/(5^5)=24/625 is answer - 11 years agoHelpfull: Yes(20) No(0)
- total number of choices=5*5*5*5*5=5^5
favourable cases=5*4*3*2*1=5!
probability=5!/5^5 - 11 years agoHelpfull: Yes(19) No(0)
- So consider lift has 5 persons... when it reaches 1st floor...1 person may go out and other person may enter it... so there are people from different floor...hence the possible solution may be 5*4*3*2*1/5^5=120/5^5=24/125 so d. none of these
- 11 years agoHelpfull: Yes(6) No(5)
- n(s)=5^5
n(e)=5*4*3*2*1
p(e)= 5!/(5^5). - 11 years agoHelpfull: Yes(2) No(1)
- 5*4*3*2*1/5^5
- 11 years agoHelpfull: Yes(1) No(0)
- ans is 5!/5^5
- 11 years agoHelpfull: Yes(1) No(0)
- 24/625 is the answer !!!
- 11 years agoHelpfull: Yes(1) No(0)
- its dummy question........
- 10 years agoHelpfull: Yes(0) No(0)
TCS Other Question