(1) In a class every boy is friends with exactly 3 girls. Every girl is friends with exactly 2 boys. There are only 19 desks (each holding at most two students), and 31 of the students in the class study French. How many students are there?
(2) A smaller circle rolls along the inside curve of a larger circle. The diameter of the larger circle is 3 times that of the smaller circle. How many revolutions does the small circle have to make to complete the inside curve of the larger circle?
I think the answer is 3. If I cut the circles and lay them flat on the ground, the larger circle is 3 times longer than the smaller circle. So the smaller circle would have to revolve 3 times in order to equal the distance inside the larger circle. Is that correct?
Does anyone know the odds of having Two girls as children as opposed to two males or one male and one female? I say it is 25 percent but my friend says it is 33.3 percent. Can anyone clarify? Thanks! You are correct. Assuming that
In a family with two children, what are the probabilities of the following outcomes, assuming that the birth of boys and girls is equally likely? a. Both are boys. b. The first is a girl and the second a boy. c. Neither is a girl.
So I'm writing a Plot for a class and so far I have 3 girls who used to be best friends but got mad at each other over [Situation; like with a boy, each other, something idk] and haven't talked or seen each other in 6 years. They
When Ms Shreve randomly selects a student in her class, she has 1/3 probability of selecting a boy. A: If her class has 36 students, how many boys are in her class? B: if there are 11 boys in her class, how many girls are in her
There are 36 pupils in a class. Each girl is given 8 books and each boy is given 3 books. The total number of books the girls receive is 46 more than the total number of books the boys receive. How many girls are there in the