Question

How many ways can a president and vice president be selected from a class of 12?

Answer 1

a 23
b 72
c 132
d 1320

Answer 2

@triciaal @phi

Answer 3

are u sure it is b

Answer 4

There are 12 choices for the first official. Have made the first choice, there are 11 choices for the second official. Therefore the number of ways is given by 12 * 11.

Answer 5

So c?

Answer 6

order matters. in other words joe president and obama vice president is different from
obama president and joe vice president

Answer 7

when order matters, think "permutation"
12P2

Answer 8

a 23
b 72
c 132
d 1320

Answer 9

so what do u guys think the answer is

Answer 10

The answer is definitely given by the product of 12 and 11. This is the same result with my reasoning and with the formula for permutations.

Answer 11

so the answer is c 132

Answer 12

Correct.

Answer 13

thanks soooo much

Answer 14

You're welcome :)