First, we can choose the seats for the four mathematicians. Then we seat the physicits, then the engineer. There are 4! ways to seat the mathematicians, then 3! ways to seat the physicists, then 1! ways to seat the engineer. But then we must divide by 8, because we can rotate the table, so there are 8!*4!*3!/8 = 725760 ways to seat everyone.

3 0

3 years ago

In how many ways can 2 singers be selected from 4 who came to an audition?

Svetlanka [38]

First part its 4C2 = 4*3 / 2 = 6

Second part
12 * 100
---------- = 4.3 %
280

3 0

3 years ago

Read 2 more answers

In a newspaper, it was reported that yearly robberies in Springfield were down 30% to 91 in 2013 from 2012. How many robberies w

Artyom0805 [142]

Answer:

130