(a) It is known that among any group of the three students in a class two of them are friends. Total number of students is 25. Prove that there is a student who has at least 12 friends.
(b) There are 30 students in a class. They sit at 15 double desks, each one is for two students. Half of the girls sit with boys. Is it possible to make a rearrangement so that half of the boys sit with girls? Answered by Penny Nom.
From Bing: there are 38 math students. How many men and women strudents are there if the women exceeded one half of the men by 17? Answered by Stephen La Rocque.
From Amy: Four students drive to school in the same car. They claim they were late because they had a flat tire. Assuming they did not have a flat tire what is the probability that they all would choose the same tire if asked which one was flat. Answered by Stephen La Rocque.
From Jessie: My teacher told me that the number of ways of lining up the 450 students in our school is larger than the number of atoms in the universe. Is this right?
This question came to Good Question, a regular feature on the CBC Morning Edition radio show in Saskatchewan.
Answered by Denis Hanson and Harley Weston.
Page 1/1
Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.