Copyright

Josh scores 75, 60, and 94, on the first 3 exams. If his 4th exam score is 10/9 of the average of...

Question:

Josh scores 75, 60, and 94, on the first 3 exams. If his 4th exam score is 10/9 of the average of the first three, what does he have to score in the next two in order to average an 85 on the exam?

Average

It is the ratio of the sum of total data to the to total number of data. From a set of n data, average can be formulated as:

$$Average =\ \dfrac{Sum\ of\ data}{Number\ of\ data} $$

$$Average\ =\ \dfrac{x_1 + x_2 + x_3. .. . . x_n }{n} $$

$$Average =\ \dfrac{\Sigma_{x=1}^n x}{n} $$

Answer and Explanation:

Become a Study.com member to unlock this answer! Create your account

View this answer

The scores of first three exams are : {eq}75,\ 60,\ and\ 94 {/eq}

Average of first three exams:

$$Average =\ \dfrac{Sum\ of\ data}{Number\ of\...

See full answer below.


Learn more about this topic:

Loading...
Law of Averages: Definition & Formula

from

Chapter 5 / Lesson 8
15K

Related to this Question

Explore our homework questions and answers library