If 28a+30b+31c=545.
then a+b+c=?.a,b,c are natural numbers
Choose the correct choice from the following options:  A) 12  B) 14  C) 8  D) 25  E) 18

Rationale: have a look on your calender since , we all knw a year consist of 365 days february is d only month which has 28 days 4 months in a year has 30 days and , rest 7 months has 31 days . . so , following d given eq . we can write 28 * 1 + 30 * 10 + 31 * 7 . . hence values of a , b and c are 1 , 10 and 7 respectively . . a + b + c = 18 answer : e
Answer: E