Current location - Training Enrollment Network - Mathematics courses - The stems and leaves recorded the output data of five worker ants in group A and group B on a certain day.
The stems and leaves recorded the output data of five worker ants in group A and group B on a certain day.
With the end of the 20 17 college entrance examination mathematics subject, what parents and candidates want most is the answers to the college entrance examination mathematics questions. Here, I will provide you with the questions and answers of the 20 17 Shandong college entrance examination liberal arts mathematics paper for parents and students' reference. I wish the college entrance examination students good results this year.

(2) It is known that I is an imaginary unit. If the complex number satisfies zi= 1+i, then z? =

A.-2i B.2i C.-2 D.2

The answer to this question is a.

(8) The stem and leaf diagram as shown in the figure records the output data (unit: pieces) of five workers in each group of A and B on a certain day. If the median of the two sets of data is equal and the average is equal, the values of x and y are respectively

A 3,5b5,5c3,7d5,7

The answer to this question is a.

(16) (the full score of this small question is 12)

A tourist plans to travel in three Asian countries A 1, A2 and A3 and two of three European countries B 1, B2 and B3.

(i) If you choose two of these six countries, find the probability that both countries are Asian countries;

(2) If 1 is selected from Asian countries and European countries, find the probability that these two countries contain A 1 but not B 1.

The above questions and answers are part of the 20 17 Shandong liberal arts mathematics test paper, for reference only.