How can i verify a interval in array with one function

How can i verify how many numbers in a array is in or out a 10-20 interval (10 and 20 included) in one function? I tried but i just got it with two functions, one to verify if its out and one to verify if its in.

let array = [1,3,7,10,14,18,20,23,27]

function inInterval(e){
    if (e >= 10 && e <=20) {
        return e
    }
}

function outInterval(e) {
    if (e <10 || e>20) {
        return e
    }
}

let inIntervalResult = array.filter(inInterval).length
let outIntervalResult = array.filter(outInterval).length

console.log(inIntervalResult, outIntervalResult)