Question

There are 5 boys and 4 girls in my class. All of them are distinguishable.

In how many ways can they be seated in a row of 9 chairs such that at least 3 girls are all next to each other?

Answer 1

well,we can put all the 3 girls in a circle !

Answer 2

or 4 girls

Answer 3

so here we have 7! .ways to arrange them..

Answer 4

and for all of them we have 3! ways to set those 3girls in that circle.

Answer 5

so it would be 7!.3!

Answer 6

No thats wrong though

Answer 7

I tried it and got it wrong

Answer 8

well,i think u made a mistake.

Answer 9

how did u get the answer ?

Answer 10

Isn't the answer 7! times 3!

Answer 11

what did i say ? :|:| i said 7!.3! too :| "dot" is "times"

Answer 12

i mean 7!.3! = 7! x 3!

Answer 13

got it?

Answer 14

THat;s wrong though, that;s what i put before

Answer 15

u mean 7!.3! is worng?
@ganeshie8 can u please check my work?

Answer 16

yeah