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정답입니다.
틀렸습니다.
   const choiceSelected = (answer) => {
        let userAnswer = answer.textContent;
        let currentAnswer = quizInfo[quizCount].answerResult; 

        if(userAnswer == currentAnswer){
            console.log("정답")
            quizView.classList.add("like")
            quizScore++
        }else {
            console.log("오답")
            quizView.classList.add("dislike")
            quizResult.style.display = "block";
        }
        quizConfirm.style.display = "block";
    }

    // if(100/quizInfo.length*quizScore >= 60){
    //     quizConfirm.textContent = `합격입니다.`
    // }else{
    //     quizConfirm.textContent = `불합격입니다.`
    // }

    //정답 확인 버튼
    const answerQuiz = () => {
        //마지막 문제
        if(quizInfo.length -1 == quizCount ){
            if(100/quizInfo.length*quizScore >= 60){
                quizConfirm.textContent = `총 ${quizInfo.length}문제 중에 ${quizScore}문제를 맞췄습니다. 총 ${Math.floor(100/quizInfo.length*quizScore)}점 합격입니다.`
            }else{
                quizConfirm.textContent = `총 ${quizInfo.length}문제 중에 ${quizScore}문제를 맞췄습니다. 총 ${Math.floor(100/quizInfo.length*quizScore)}점 불합격입니다.`
            }
        };

        quizCount++
        updateQuiz(quizCount);
        quizView.classList.remove("like","dislike")
    
    }

    quizConfirm.addEventListener("click",answerQuiz); 
<div class="quiz_wrap">
</div> 
.quiz_wrap {
        display: flex;
        align-items: flex-start;
        justify-content: center;
        margin-top: 50px;
        margin-bottom: 150px;
        flex-wrap: wrap;
    }

    .quiz {
        max-width: 500px;
        width: 100%;
        background-color: #fff;
        border: 8px ridge #cacaca;
        margin: 10px;
    }

    .quiz_type {
        background-color: #cacaca;
        text-align: center;
        display: block;
        /*span이라 inline이어서*/
        font-size: 16px;
        border: 3px ridge #cacaca;
        color: #3b3b3b;
        font-family: "DungGeunMo";
        padding: 4px;
    }

    .quiz_question {
        border-top: 6px ridge #cacaca;
        border-bottom: 6px ridge #cacaca;
        padding: 20px;
        font-family: "TwayAir";
        line-height: 1.3;
    }

    .quiz_question .number {
        color: #b771f8;
    }

    .quiz_question .ask {
        display: inline;
    }

    .quiz_answer {
        border-top: 6px ridge #cacaca;
        padding: 10px;
        background-color: #f5f5f5;
    }

    .quiz_answer .confirm {
        border: 6px ridge #cacaca;
        width: 100%;
        font-size: 22px;
        padding: 13px 20px;
        background-color: #d6d6d6;
        font-family: "TwayAir";
        cursor: pointer;
    }

    .quiz_answer .result {
        width: 100%;
        font-size: 22px;
        padding: 13px 20px;
        border: 6px ridge #cacaca;
        box-sizing: border-box;
        text-align: center;
        font-family: "TwayAir";
        line-height: 1.3;
    }
    .quiz_answer .input {
        width: 100%;
        border: 6px ridge #cacaca;
        font-size: 22px;
        padding: 13px 20px;
        background-color: #fff;
        font-family: "TwayAir";
        margin-bottom: 10px;
    }
    .quiz_view {
        background-color: #f5f5f5;
        font-family: "TwayAir";
        position: relative;
        overflow: hidden;
    }
    .quiz_view .true {
        width: 120px;
        height: 120px;
        line-height: 120px;
        background-color: #8beeff;
        color: rgb(60, 68, 136);
        border-radius: 50%;
        text-align: center;
        position: absolute;
        left: 70%;
        top: 100px;
        opacity: 0;
    }
    .quiz_view .false {
        width: 120px;
        height: 120px;
        background-color: rgb(255, 205, 68);
        color: rgb(82, 39, 22);
        line-height: 120px;
        border-radius: 50%;
        text-align: center;
        position: absolute;
        right: 70%;
        top: 100px;
        opacity: 0;
    }
    .quiz_view.like .true{
        opacity: 1;
        animation: wobble 0.6s;
    }
    .quiz_view.dislike .false{
        opacity: 1;
        animation: wobble 0.6s; /*wobble 좌우로 흔드는 애니메이션*/
    }

    .quiz_selects {
        margin: 5px 0;
    }

    .quiz_selects label {
        display: flex;
    }
    .quiz_selects label input {
        position: absolute;
        left: -9999px;
    }
    .quiz_selects label span {
        font-size: 20px;
        line-height: 1.3 ;
        font-family: "TwayAir";
        padding: 10px;
        display: flex;
        align-items: center;
        width: 100%;
        border-radius: 5px;
        cursor: pointer;
    }

    .quiz_selects label span::before {
        content: '';
        width: 30px;
        height: 30px;
        border-radius: 50%;
        background: #fff;
        display: flex;
        margin-right: 15px;
        flex-shrink: 0;
        box-shadow: inset 0px 0px 0px 4px #b781e9;
        transition: all 0.25s;
    }

    .quiz_selects label input:checked + span {
        background-color: rgb(228, 224, 235);
    }

    .quiz_selects label input:checked + span::before {
        box-shadow: inset 0px 0px 0px 10px #b781e9;
    }

    .quiz_confirm {
        width: 100%;
        text-align: center;
    }
    .quiz_confirm .check {
        font-size: 22px;
        line-height: 1.3;
        padding: 13px 60px;
        border: 6px ridge #cacaca;
        box-sizing: border-box;
        text-align: center; 
        font-family: "TwayAir";
        cursor: pointer;
        margin: 40px 0;
        transition: background 0.3s;
    }

    .quiz_confirm .check:hover {
        background: #b080fd;
    }

    .quiz_confirm .ex {
        font-family: "DungGeunMo";
        font-size: 28px;
        font-weight: 500;

    }