A man bought 2 articles for ₹3050 each. He sold onearticle at 10% loss and another at 20% profit. The total profit/loss percentage he earned is:

Two articles for 3050 each

For first article

20% profit or gain means. SP = cost price + 20%of CP(cost price)

=3050 + 20/100 ×3050

=3050 +610 =3660

Similarly for

Second article

10% loss means SP (SELLING PRICE)=3050(CP)- (subtracting because it is loss) 10% of CP

= 3050-10/100 ×3050 =2745

now you asked overall gain or loss

So total money spent =3050+3050=6100

total money got = 3660 + 2745 =6405

So clearly it is profit or gain 

Now how much profit you gain

=total money got- total money spend

=6405 - 6100= 305

now gain percentage =profit ÷CP×100=305 /6100×100=5% gain