明天就考了,求两道数学狗狗答案

chunk6278

68%mean of standard deviation, most average 84 with standard deviation 6, ask score 92 represent what percentile?没看懂题答案有：84，92，97.。。。。
317. <x> is the remainder of 3x ，which of following must be equal to 1? (这道题大家看看寂静有没有，我实在记不清，当时完全没有任何clue）
I.  <2x+1>
II. 2<x+1>
III.
A. I ONLY
B. II ONLY
C. III ONLY
D, I II
E. II III