Read the following question and decide which of the given statements is are sufficient.
Question:
The total marks of X, Y and Z is 180. What is X’s marks?
Statements:
1. Average of Y and Z together is 50 marks
2. Average of X and Z together is 60 marks
1
Both 1 and 2 together are sufficient
2
Either 1 or 2 is sufficient
3
1 alone is sufficient while 2 alone is not sufficient
4
2 alone is sufficient while 1 alone is not sufficient