contestada

You score an 86 on the first of two exams. Write and solve an equation to find the score x that you need on the second exam to have a mean score of 90.

Respuesta :

CM722
I haven't touched on mean, mode, medium, and range in a little while so I could be wrong, but if (mean) means average, i think average is adding 2 grades together then dividing the number of exams, so the average needs to be 90, so what I did was i found the difference between the original grade on the first exam, so 90-86=4, so i guessed at 94 being the next grade needed. (86+94)/2=90. 86+94=180 then divide 180 by 2 and it equals 90. so yeah your answer is 94.

The score in the second exam is 94.

What is a Mean?

  • Mean is the average value of all the numbers in the given set.
  • Mean is calculated to get the average outcome.

Given:

Score in the first exam = 86

Mean score of two exams = 90

We have to find the score of second exam.

Let the score of second exam be x.

We know, mean is given by:

⇒ Mean = (Total score in all the exams) / (Total number of exams)

Here,

Total score in all the exams = 86 + x

Total number of exams = 2

Mean = 90             (given)

⇒ 90 = (86 + x)/2

⇒ 90 × 2 = 86 + x

⇒ 180 = 86 + x

⇒ x = 180 - 86

⇒ x = 94

Therefore, the score in the second exam is 94.

Learn more about the Mean here: https://brainly.com/question/15823385

#SPJ2

Otras preguntas