Answer:
The correct options are A and E.
Explanation:
Let Mark's age be y and Nick's be x.
Then difference between their ages is given by:
(x - y = 11) or (y - x = 11), since Mark may be older than Nick or vice-versa.
The two expression can be combined absolutely as:
|y - x| = 11
Mark is 25 years old. This implies,
|25 - x| = 11.
x (Nick's age) can be calculated from the above equation. Therefore, E is correct.
solving the equation:
|25 - x| = 11
means:
25 - x = 11
x = 25 - 11
x = 14
or:
25 - x = -11
x = 25 + 11
x = 36
That is, Nick can be 36 years old (Option A).