How many different twotwo-letter passwords can be formed from the letters
Upper A, Upper B, Upper C, Upper D, Upper E, Upper F, Upper G and Upper H
A, B, C, D, E, F, G and H
if no repetition of letters is allowed?

Step-by-step explanation:

GIVEN: two two-letter passwords can be formed from the letters  A, B, C, D, E, F, G and H.

TO FIND: How many different two two-letter passwords can be formed if no repetition of letters is allowed.

SOLUTION:

Total number of different letters

for two two-letter passwords different are required.

Number of ways of selecting different letters from letters

Hence there are different two-letter passwords can be formed using letters.

not enough information

step-by-step explanation:

we cannot know this, because the other students could have handed out 10 flyers, or they could have handed out 100. one way, the mean would go up, and another way, the mean would go down.