The answer to this is: x = y / 2
Answer:
the numbers are 43 and 15
Step-by-step explanation:
Let the numbers are x and y
x+y=58
x-y=28
from that two equations,
2x=86
x=43
substitute x value in any equation we will get ,
y=15
<u><em>Explanation</em></u>
5 students got 6 mark each, 4 students got 7 marks each, 7 students got 8 marks each, 10 students got 9 marks each and 4 students got 10 marks each.
(a) <u>Range is the difference of highest mark and lowest mark.</u> Here, the highest mark is 10 and lowest mark is 6.
So, the range of mark
(b) Total number of students in the group
(c) Mean is the <u>simple average.</u> So, for finding the Mean, we will divide the total marks obtained by all students by the total number of students.
Total marks obtained by all students
So, the Mean mark of the group
divide it two numbers to get 11.090909 which would most likely to be 11.10