what is the probability that 4 numbers selected from 1 to 40
are not consecutive.
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Answer / somasundarraj
1,2,3,4
2,3,4,5
.....
.....
37,38,39,40
and their reverse as
4,3,2,1
5,4,3,2
.....
....
40,39,38,37
total no. of ways to arrange 4 numbers out of 40 = 40 P 4
probability= 1- 12*37 / 40*39*38*37
= 29639 /29640
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