The correct answer for this question is 70
Answer:
Step-by-step explanation:
Double negative = Positive:
Apply negative exponent formula:
Multiply:
Apply exponent rule:
Thus,
Simplify:
The total number of articles is 14 and only 7 can be published. Since what is asked is the ways to assemble the 7 articles, this is a permutation problem.
14P7 = <span>17297280 ways
If order is not of concern, the problem is just a combination problem
14C7 = </span><span>3432 ways</span><span />