A math problem about trees in grade three.

Solution: (1) Disagree. Because after stirring, any chess piece is pulled out, the probability of hitting Bai Zi is 2/3, and the probability of hitting a sunspot is 1/3. (2) The list is as follows. The probability of finding out that two blocks are Bai Zi is 2/6, that is, 1/3.

(3) Make the probability of finding sunspots two-thirds, that is, the probability of finding Bai Zi is one-third.

The total number of blocks should be 2÷( 1/3)=6, and the existing number of blocks is 3, so three sunspots should be added.

Work plan of senior two math preparation group

Jiangsu education printing plate eighth grade physics unit examination questions and answers.

Hainan university journalism and communication postgraduate entrance examination experience sharing?

Mathematical experts answer! ! ! ! ! Kneel down and thank you! ! ! ! !

Examination questions and answers of liberal arts mathematics in Mianyang Second Diagnosis in 2022 —— Analysis of answers of liberal arts mathematics examination questions in Mianyang Second Diagnosis

How to judge whether an angle is a right angle in Grade Two?

What great achievements did modern mathematicians in China make?

Overview of Yicheng No.1 Middle School

Which is better, making a fuss or testing butterflies?

Number of Senior High School Students in Chongyang County, Xianning City in 2023