Find the mean of three numbers stored in an array of objects

Question

Find the mean of three numbers stored in an array of objects

I am currently working on a school assignment that requires me to develop a function for calculating the average mark of 3 students using an existing object in an array. Below, you can see the array and function that I have been working on as part of this assignment.

After spending the past hour researching and experimenting with different approaches, I am unable to figure out how to write the function to sum up the current marks and divide them by the array length.

Could someone please provide insight into what I might be missing or where I may have gone wrong?

let classList = [];

const enrollStudent = (firstName, lastName, age, currentMark) => {
      newStudent = {firstName, lastName, age, currentMark};
      classList.push(newStudent);
      console.log(classList);
  };

  addNewStudent("Mark", "Smith", 24, 85);
  addNewStudent("Dane", "Joe", 21, 90);
  addNewStudent("Steven", "McKnight", 23, 54);

const getClassAverage = arr => classList.reduce((newStudent.currentMark) => currentMark + currentMark, 0) / classList.length

javascript node.js arrays function

Answer 1

Answer №1

let studentList = [];

const addStudentToList = (firstName, lastName, age, currentMark) => {
      newStudent = {firstName, lastName, age, currentMark};
      studentList.push(newStudent);
      console.log(studentList);
  };

  addStudentToList("Mark", "Smith", 24, 85);
  addStudentToList("Dane", "Joe", 21, 90);
  addStudentToList("Steven", "McKnight", 23, 54);

  const totalMarks = studentList.reduce( (acc, student) => { 
            return acc + student.currentMark
}, 0)


const calculateClassAverage = totalMarks / studentList.length // 76.33333333333333

Answer 2

let studentList = [];

const addStudentToList = (firstName, lastName, age, currentMark) => {
      newStudent = {firstName, lastName, age, currentMark};
      studentList.push(newStudent);
      console.log(studentList);
  };

  addStudentToList("Mark", "Smith", 24, 85);
  addStudentToList("Dane", "Joe", 21, 90);
  addStudentToList("Steven", "McKnight", 23, 54);

  const totalMarks = studentList.reduce( (acc, student) => { 
            return acc + student.currentMark
}, 0)


const calculateClassAverage = totalMarks / studentList.length // 76.33333333333333

Find the mean of three numbers stored in an array of objects

Answer №1

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