Answer:
Letters can be chosen in 12 different ways, if order matters, or 6 different ways, if order doesn't matter.
Step-by-step explanation:
Since we want to choose 2 letters, without replacement, from the 4 letters A, B, C, and D, to determine in how many ways can this be done, if the order of the choices matters, and in how many ways can this be done, if the order of the choices does not matter, the following calculations must be performed:
If order matters =
(4 x 3 x 2 x 1) / 2 = X
24/2 = X
12 = X
If the order doesn't matter =
12/2 = X
6 = X
Therefore, letters can be chosen in 12 different ways, if order matters, or 6 different ways, if order doesn't matter.
The number of calculators
= Number of boxes * calculators in each box
=18* 12
= 216 calculators
Answer:
28 pages
Step-by-step explanation:
240 minutes = 4 hours
240 minutes = 112 pages read
You have to divide by 4 the numbers are in each side, it would be like this:
60 minutes = 28 pages read
60 minutes is equal to an hour
1 hour = 28 pages read
Hope this was helpful :)
