A.条件(1)充分,但条件(2)不充分. B.条件(2)充分,但条件(1)不充分. C.条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分. D.条件(1)充分,条件(2)也充分. E.条件(1)和条件(2)单独都不充分,条件(1)和条件(2)联合起来也不充分.
单项选择题After 5 games, a rugby team had an average of 28 points per game. In order to in crease the average by n points, how many points must be scored in a 6th game ?()
A.n B.6n C.28n D.28+n E.28+6n
单项选择题Pam and Ed are in a line to purchase tickets. How many people are in the line ?() (1)There are 20 people behind Pare and 30 people in front of Ed. (2)There are 5 people between Pam and Ed.