Harvey teaches a certain number of biology students in 2 classes, K and L. He can divide the students in class K into 7 groups of n students each. He can divide the students in class L into 6 groups of p students each with 1 student left over. How many students are in class L ?
(1) n = p
(2) There are 5 more students in class K than in class L
OA that I have is
; however, I'm feeling
should give the right answer already.
(2): 7n=6p+6: insuff: when n= 6k (k is an integer), p=k-1
(1) and (2): 7n=6n+1: suff