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Find the probability in a group of 10 students sitting in a row , two of them
always sit next to each other
Read Solution (Total 4)
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- Assume that these 2 students are 1 and then u can sit is 9! and these 2 students can sit by 2 ways then total ways are 9!*2
and the probability is 9!*2/10! = 1/5=0.2 - 12 years agoHelpfull: Yes(18) No(2)
- permutation is 2!9!(n(E))
n(s)= 10!
probability = (2!9!)/10! = 0.2 - 10 years agoHelpfull: Yes(6) No(0)
- 2!*9!/10!
=1/5
- 10 years agoHelpfull: Yes(2) No(0)
- 2!9!
taking 2 students as 1 we have 9 arrangements.. and those 2 can exchange positions within themselves. - 10 years agoHelpfull: Yes(0) No(4)
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