What is the probability that 4 numbers selected from 1 to 40 are not consecutive

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bluenyt_09

  • Jun 20th, 2007
 

ans ===>3/4

the prob of 4 cosecutive nos r===10/40==1/4

the prob of not getting 4 consecutive no.s===1-1/4=3/4

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rushi_gamer

  • Jul 23rd, 2008
 

from 1 to 40 there are 37 possible combinations of 4 consecutive numbers.....

we hav to choose 4 numbers from 1 to 40.....

so possible outcomes= 40C4...

thus, required outcome = 37/(40C4)=  1/2470


ANSWER= 1/2470

rajeswarisvgrnthn

  • Aug 30th, 2010
 

From 1 to 40 there are 37 possible combinations of 4 consecutive numbers.
Total number of possible combinations= 40C4.
Probability of outcome to be consecutive = 37/(40C4)= 1/2470
Probability of outcome not to be consecutive = 1-(1/2470)= 2469/2470


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