## anonymous 5 years ago In how many ways can 1 man and 1 woman, in that order, be selected from 7 men and 8 women?

1. anonymous

7C1 * 8C1

2. anonymous

in that order : $7\times 8$

3. anonymous

=56

4. anonymous

is that the formula?

5. anonymous

no that is the 'multiplication principle' which says if i can do one thing n ways and another thing m ways then the number of way i can do them both is n times m

6. anonymous

like those problems that say you have 3 choice of appetizer, 4 of entrées and 2 desserts then you have 3*4*2 different possible meals

7. anonymous

A department store manager wants to display 7 brands of a product along one shelf of an aisle. In how many ways can he arrange the brands? so you would do 7*1?

8. anonymous

think that you have seven slots in which to put 7 items. you have 7 choices for the first one. so far 7 ways

9. anonymous

now one brand is used and so you have 6 choices for the next slot. so far 7*6

10. anonymous

now you have 5 choices for the fifth slot, 4 choices for the 4th etc. and you have to multiply all these together by the multiplication principle

11. anonymous

answer is $7\times 6\times 5\times 4\times 3\times 2 \times 1$

12. anonymous

this number is also written as 7!

13. anonymous

ur awesome lol

14. anonymous

ty

15. anonymous

i have a worksheet on scp im reading the textbook but it dosent break it down for me to good so im just trying to understand it

16. anonymous

scp?

17. anonymous

sequential counting principle

18. anonymous

got it any more ?

19. anonymous

o yea lol

20. anonymous

got time for one more if you want to ask

21. anonymous

At a high school cafeteria, diners can choose one vegetable from a choice of 4 vegetables, one meat from a choice of 3 meats, one serving of bread from among 4 breads, and a dessert from among 2 desserts. How many meal configurations are possible?

22. anonymous

lol

23. anonymous

we just did this remember? look above!

24. anonymous

i would do 4*3*4*2?

25. anonymous

xactly

26. anonymous

yes but what confused me is when it says choose one vegetable from a choice of 4 vegetables,

27. anonymous

so i thougt i had to do the 4*3*2*1

28. anonymous

yes one choice of the 4, so you have 4 choices. silly english i know, but that is what it means.

29. anonymous

now i will go have lunch myself. you look to be in good shape for this.

30. anonymous

have a good lunch.. wish i can buy for helping me