---
title: "Proxy Feed"
url: https://extraproxies.com/category/proxy-feed
type: term
taxonomy: category
taxonomy_label: "Category"
count: 3
lang: en
---

# Proxy Feed

## Latest entries

- [Finding the probability of having a genetic trait given test is positive](https://extraproxies.com/finding-the-probability-of-having-a-genetic-trait-given-test-is-positive) — I've been doing this question but I'm a little stuck on the second part. The first part is as follows: The probability of a randomly selected person in a population having a particular genetic trait...
- [Is there another way of expressing $\sum\limits_{k=1}^n \binom{n}{k} \cdot (n-k)! \cdot k!$?](https://extraproxies.com/is-there-another-way-of-expressing-sumlimits_k1n-binomnk-cdot-n-k-cdot-k) — I have stumbled across the formula $ \sum\limits_{k=1}^n \binom{n}{k} \cdot (n-k)! \cdot k!$ in some applied context. It looks as though there might be a nice combinatorial background to this...
- [Some questions about a special semiscalar product](https://extraproxies.com/some-questions-about-a-special-semiscalar-product) — Define the semiscalar product [x,y] by $ $ [x,y]=\inf_{t>0}\frac{1}{2t}[||x+ty||^2-||x||^2].$ $ E be an n.v.s. I donot know how to prove that 1.$ [x,\lambda x+\mu y]=\lambda||x||^2+\mu[x,y]\...