Answer:
66
Step-by-step explanation:
Use the formula for the mean of a set of numbers:
sum of the numbers
average = --------------------------------
count of numbers
Here we know that the average mark was 68, so we can write:
75 + 62 + 84 + 53 + x
average = 68 = ----------------------------------
5
or 274 + x
68 = -------------------
5
Solving for x, we multiply both sides by 5: 340 = 274 + x.
Subtracting 274 from both sides effectively isolates x:
340 = 274 + x
- 274 -274
------------------------
66 = x
The fifth student's mark was 66.
Answer:
ugsrgnSRernynerytydheyhxeryfrxjvvvbhfrea3sxrggdho
Answer:
The answer is A i must took the test
Step-by-step explanation:
Y=2x+6
(This is me filling space)
Answer:
I dont know
Step-by-step explanation:
only doing it for points