Knowee
Questions
Features
Study Tools

How many possible ordered triples (𝑥1,𝑥2,𝑥3)(𝑥1,𝑥2,𝑥3) are there such that 𝑥1,𝑥2,𝑥3𝑥1,𝑥2,𝑥3 are non-negative integers and 𝑥1+𝑥2+𝑥3=38𝑥1+𝑥2+𝑥3=38?

Question

How many possible ordered triples (x1,x2,x3)(x_1,x_2,x_3) are there such that x1,x2,x3x_1,x_2,x_3 are non-negative integers and x1+x2+x3=38x_1+x_2+x_3=38?

🧐 Not the exact question you are looking for?Go ask a question

Solution

This problem can be solved using the stars and bars method in combinatorics.

The stars and bars method is a way to distribute n identical items into k bins. In this case, we are distributing 38 identical items (the total sum) into 3 bins (the variables x1, x2, x3).

The formula for stars and bars is (n+k-1 choose k-1), where "choose" represents a combination.

So, we have (38+3-1 choose 3-1) = (40 choose 2).

The combination formula is n! / [k!(n-k)!], where "!" represents factorial.

So, (40 choose 2) = 40! / [2!(40-2)!] = 4039 / (21) = 780.

Therefore, there are 780 possible ordered triples (x1, x2, x3) such that x1, x2, x3 are non-negative integers and x1+x2+x3=38.

This problem has been solved

Similar Questions

How many possible ordered triples (𝑥1,𝑥2,𝑥3)(𝑥1,𝑥2,𝑥3) are there such that 𝑥1,𝑥2,𝑥3𝑥1,𝑥2,𝑥3 are non-negative integers and 𝑥1+𝑥2+𝑥3=38𝑥1+𝑥2+𝑥3=38?

The number of ordered triplets (x, y, z), such that x, y, z are distinct prime numbers and xy + yz + zx = 120 is

How many pairs of integers exist for which the difference between their sum and product is 42

How many ordered pairs of integers (x, y) satisfy the equation x2 + xy + y2 = x2y2

The range of 𝑓(𝑥)=∣𝑥−3∣f(x)=∣x−3∣is:A.None of theseB.𝑦≥3y≥3C.𝑦<3y<3D.𝑦>3y>3E.𝑦≥0y≥0

1/1

Upgrade your grade with Knowee

Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.