Question of the week 06-May-2020

Q) The value of 29% of 124 + 31% of 84 is

a) 80       b) 71          c) 53      d) 62

Previous week question here. Next week question here. It is solvable in less than 20 seconds provided you know the trick that i will be discussing in the book. Your answer only with a logical explanation is welcomed in the comments section.