You are managing a project which involving 10 stakeholders. Therefore, you have been tasked with managing 45 communication channels. If there are two additional stakeholders, how many more channels must you manage?

Because there are two more stakeholders, the total number of the stakeholders are 12. Applying the formula to calculate the number of communication channels: n (n-1) ÷ 2, where n represents for the sum of stakeholders, we have the total of communication channels will be 66.
However, the question asks for the number of additional communication channels, which means that you must now subtract the original number of channels from the new number of channels to get the answer. Finally we have: 66 – 45 = 21.