#![allow(unused_imports, unused_macros, dead_code)]

macro_rules! min {
    (.. $x:expr) => {{
        let mut it = $x.iter();
        it.next().map(|z| it.fold(z, |x, y| min!(x, y)))
    }};
    ($x:expr) => ($x);
    ($x:expr, $($ys:expr),*) => {{
        let t = min!($($ys),*);
        if $x < t { $x } else { t }
    }}
}
macro_rules! max {
    (.. $x:expr) => {{
        let mut it = $x.iter();
        it.next().map(|z| it.fold(z, |x, y| max!(x, y)))
    }};
    ($x:expr) => ($x);
    ($x:expr, $($ys:expr),*) => {{
        let t = max!($($ys),*);
        if $x > t { $x } else { t }
    }}
}
macro_rules! ewriteln {
    ($($args:expr),*) => { let _ = writeln!(&mut std::io::stderr(), $($args),*); };
}
macro_rules! trace {
    ($x:expr) => { ewriteln!(">>> {} = {:?}", stringify!($x), $x) };
    ($($xs:expr),*) => { trace!(($($xs),*)) }
}
macro_rules! put {
    (.. $x:expr) => {{
        let mut it = $x.iter();
        if let Some(x) = it.next() { print!("{}", x); }
        for x in it { print!(" {}", x); }
        println!("");
    }};
    ($x:expr) => { println!("{}", $x) };
    ($x:expr, $($xs:expr),*) => { print!("{} ", $x); put!($($xs),*) }
}

fn pascal_triagle(n: usize) -> Vec<Vec<u64>> {
    let mut binom = vec![vec![0; n + 1]; n + 1];
    for i in 1..n + 1 {
        for j in 0..i + 1 {
            binom[i][j] = {
                if i == 1 || j == 0 {
                    1
                } else if j + j > i {
                    binom[i][i - j]
                } else {
                    binom[i - 1][j] + binom[i - 1][j - 1]
                }
            };
        }
    }
    binom
}


fn main() {

    let binom = pascal_triagle(52);

    let mut sc = Scanner::new();
    let n: usize = sc.cin();
    let a: usize = sc.cin();
    let b: usize = sc.cin();
    let mut xs: Vec<u64> = sc.vec(n);
    xs.sort(); xs.reverse();

    let maxsum: u64 = xs[0..a].iter().sum::<u64>();  // with a items
    put!(maxsum as f64 / a as f64);

    let mut ans = 0;

    for k in a..b+1 {

        let sum = xs[0..k].iter().sum::<u64>();
        if maxsum * k as u64 != sum * a as u64 {
            continue
        }

        let mut u = 0;
        for i in 0..k { if xs[i] == xs[k - 1] { u += 1 } }
        let mut v = 0;
        for i in k..n { if xs[i] == xs[k - 1] { v += 1 } }
        ans += binom[u + v][v];
        // trace!((u + v, v), binom[u + v][v]);
    }
    put!(ans);

}

use std::io::{self, Write};
use std::str::FromStr;
use std::collections::VecDeque;

struct Scanner { stdin: io::Stdin, buffer: VecDeque<String>, }
impl Scanner {
    fn new() -> Self { Scanner { stdin: io::stdin(), buffer: VecDeque::new() } }
    fn cin<T: FromStr>(&mut self) -> T {
        while self.buffer.len() == 0 {
            let mut line = String::new();
            let _ = self.stdin.read_line(&mut line);
            for w in line.split_whitespace() {
                self.buffer.push_back(String::from(w));
            }
        }
        self.buffer.pop_front().unwrap().parse::<T>().ok().unwrap()
    }
    fn chars(&mut self) -> Vec<char> { self.cin::<String>().chars().collect() }
    fn vec<T: FromStr>(&mut self, n: usize) -> Vec<T> { (0..n).map(|_| self.cin()).collect() }
}


Measured memory_bytes: 4352