jones attained the following scores in three tests 36,75,60. if his average in four tests is 75, find his mark in the fourth test.
75 x 4 = 300
36 + 75 + 60 = 171
300 - 171 = 129 wow must have been lot of extra credit.
on three 150 point history test, you earned 88%, 94% and 90%. the final test is worth 250 points. what
percent is needed in the final test to earn 93% of total points on all tests
To find Jones' mark in the fourth test, we can use the formula for average:
Average = (Sum of all scores) / (Total number of scores)
We know that Jones attained the following scores in three tests: 36, 75, and 60. Let's denote the fourth test score as "x". Hence, the sum of all four scores would be (36 + 75 + 60 + x).
Now, we are given that the average of the four tests is 75. Therefore, we can set up the equation:
75 = (36 + 75 + 60 + x) / 4
To find the value of "x," we need to solve this equation.
Step 1: Multiply both sides of the equation by 4 to eliminate the denominator:
75 * 4 = (36 + 75 + 60 + x)
Step 2: Simplify the equation:
300 = 171 + x
Step 3: Isolate the variable "x" on one side by subtracting 171 from both sides of the equation:
300 - 171 = x
Step 4: Simplify the equation further:
x = 129
Therefore, Jones' mark in the fourth test is 129.