#![allow(unused, non_snake_case, dead_code, non_upper_case_globals)]
use std::cmp::*;
use std::collections::*;
use std::mem::*;

fn main() {
    let (r, w, e) = (std::io::stdin(), std::io::stdout(), std::io::stderr());
    let mut io = IO::new(r.lock(), w.lock(), e.lock());
    assert_eq!(!0usize, std::usize::MAX); //🙊
    assert!(0 == 0); //😇

    let n = io.read::<usize>();
    let a = io.read::<usize>();
    let b = io.read::<usize>();
    let mut v = io.readn::<i64>(n);
    //とりあえずそーと
    v.sort();
    v.reverse();
    //
    //平均最大化？
    // N<= 50が気になる
    // 半分全列挙とか
    // 選ぶ個数でdpとか
    // dp[i]: 前半からiこ選ぶときのアレにする？
    // あとは二分探索など

    //二分探索で、平均をk以上にできるか？
    // a *

    // 最大値は割と自明
    let mut mxsum = v.iter().take(a).fold(0, |sum, x| sum + x);
    let mut ansav = mxsum as f64 / a as f64;
    io.writeln(ansav);
    let mut dp = vec![vec![1usize; 111]; 111];
    // dp[i][j] = nCj とする
    for i in 0..77 {
        for j in 0..i + 1 {
            if j == 0 || j == i {
                dp[i][j] = 1usize;
            } else {
                dp[i][j] = dp[i - 1][j - 1].saturating_add(dp[i - 1][j]);
            }
        }
    }
    assert_eq!(dp[5][2], 10);
    assert_eq!(dp[6][3], 20);
    io.debug(&v);
    io.debug2(&v[0], &v[a - 1]);
    if v[0] == v[a - 1] {
        io.debug("1");
        let cnt = v.iter().filter(|&x| &v[0] == x).count();
        let mut ans = 0;
        io.debug(cnt);
        for i in a..min(cnt, b) + 1 {
            ans += dp[cnt][i];
            io.debug(&dp[cnt][i]);
        }
        io.writeln(ans);
    } else {
        io.debug("2");
        let mut ans = 0;
        let c1 = v.iter().take(a).filter(|&x| &v[a - 1] == x).count();
        let c2 = v.iter().filter(|&x| &v[a - 1] == x).count();
        ans = dp[c2][c1];
        io.debug2(c2, c1);

        io.writeln(ans);
    }
}

static MX: usize = 1010101;
static MOD: i64 = 1000000007;
static INF: i64 = std::i64::MAX >> 1;
// IO
use std::io::*;
struct IO<R: Read, W: Write, E: Write> {
    Read: R,
    Write: BufWriter<W>,
    Error: BufWriter<E>,
}
impl<R: Read, W: Write, E: Write> IO<R, W, E> {
    fn new(r: R, w: W, e: E) -> IO<R, W, E> {
        IO {
            Read: r,
            Write: BufWriter::new(w),
            Error: BufWriter::new(e),
        }
    }
    fn read<T>(&mut self) -> T
    where
        T: std::str::FromStr,
    {
        let next: String = self
            .Read
            .by_ref()
            .bytes()
            .map(|c| c.unwrap() as char)
            .skip_while(|c| c.is_whitespace())
            .take_while(|c| !c.is_whitespace())
            .collect();
        next.parse().ok().unwrap()
    }
    fn chars(&mut self) -> Vec<char> {
        self.read::<String>().chars().collect()
    }
    fn chari(&mut self) -> Vec<i64> {
        self.chars()
            .iter()
            .map(|&c| (c as u8 - b'0') as i64)
            .collect::<Vec<i64>>()
    }
    fn readn<T: std::str::FromStr>(&mut self, n: usize) -> Vec<T> {
        (0..n).map(|_| self.read::<T>()).collect::<Vec<_>>()
    }
    fn readmat<T: std::str::FromStr>(&mut self, n: usize, m: usize) -> Vec<Vec<T>> {
        (0..n).map(|_| self.readn(m)).collect()
    }
    fn write<S: ToString>(&mut self, val: S) {
        self.Write.write(val.to_string().as_bytes());
    }
    fn writeln<S: ToString>(&mut self, val: S) {
        self.Write.write(val.to_string().as_bytes());
        self.Write.write(b"\n");
    }
    fn debug<S: std::fmt::Debug>(&mut self, val: S) {
        writeln!(self.Error, "(debug) {:?}", &val);
    }
    fn debug2<S: std::fmt::Debug, T: std::fmt::Debug>(&mut self, val1: S, val2: T) {
        writeln!(self.Error, "(debug2) {:?} -> {:?}", val1, val2);
    }
    fn debug3<S: std::fmt::Debug, T: std::fmt::Debug, U: std::fmt::Debug>(
        &mut self,
        val1: S,
        val2: T,
        val3: U,
    ) {
        writeln!(
            self.Error,
            "(debug3) {:?} -> {:?} -> {:?}",
            val1, val2, val3
        );
    }
}


Measured memory_bytes: 4352