The sum of all prime numbers between 60 and 80 is __________ .
(A) 278
(B) 280
(C) 351
(D) 414
I had written option c but it is showing i had written option b. why?
The sum of all prime numbers between 60 and 80 is __________ .
(A) 278
(B) 280
(C) 351
(D) 414
I had written option c but it is showing i had written option b. why?