See attachment. What would be the perpendicular lines of this sense there are 4 right anglrs being formed? I thought perpendicul
ar lines had to be like like "line segment AB is perpendicular to line segment CD" or something like that. Not just one letter...
1 answer:
You might be interested in
Answer:
Step-by-step explanation:
From the question, we have the following condition:
We know that each student who hears the rumor tells it to a student picked at random from the dormitory (excluding, of course, himself/herself and the person from whom he/she heard the rumor)
The 3rd student can therefore tell the rumour to n-2 students but only n-3 will accept it.
Consequently, the 4th student must not tell the 1st and second students.
We can rewrite this to observe a pattern:
Hence, the probability that the rumor is told r times without coming back to a student who has already is:
See attachment for complete question
