
Advanced Statistics Advanced Probability and Statistics Math Forum 
 LinkBack  Thread Tools  Display Modes 
July 6th, 2017, 10:48 AM  #1 
Newbie Joined: Jun 2017 From: canada Posts: 9 Thanks: 0  combination of n integers, product not greater than x
Hello here is my problem, I have n numbers, my multiplication combination can not involve more than 2 factors. How many products smaller than x will there be? Is there a function to determine that? Thank you. Last edited by skipjack; July 6th, 2017 at 11:45 AM. 
July 6th, 2017, 10:57 AM  #2 
Senior Member Joined: Sep 2015 From: Southern California, USA Posts: 1,412 Thanks: 716 
you have n random numbers or n numbers in sequence?

July 7th, 2017, 08:32 AM  #3 
Newbie Joined: Jun 2017 From: canada Posts: 9 Thanks: 0 
exemple: n prime (11,13,17,19, 23) x not greater than 189 or x not greater than 289. I know the solution. I would like to know the path to the solution so i can do it for some other problems thank you Last edited by joswhale; July 7th, 2017 at 08:48 AM. 
July 7th, 2017, 09:01 AM  #4  
Senior Member Joined: May 2016 From: USA Posts: 785 Thanks: 312  Quote:
I greatly doubt there is a formula. You would have to start with an algorithm for finding the n  1 primes after a.  

Tags 
combination, greater, integers, product 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
combination of scalar product and vector product equation  srecko  Linear Algebra  1  October 27th, 2016 11:25 AM 
Probability that product of 2 dice greater than sum  matisolla  Probability and Statistics  2  April 16th, 2015 06:23 PM 
Product of all even integers.  Kreiger  Differential Equations  2  April 16th, 2014 04:51 PM 
Sum of the product of all integers pairs from 1 to n.  Bromster  Number Theory  5  March 21st, 2014 07:18 AM 
why the product of two negative integers is positive  fantom.1040  Algebra  7  June 28th, 2011 05:22 PM 