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Mike is a seasoned project manager who has been tasked with mentoring Bernard, a junior project manager. During a mentoring session, Mike emphasizes the importance of managing lines of communication and then asks Bernard how many stakeholders are involved in his project. Bernard responds with 15. How many lines of communication must Bernard operate for his project?

A 105

To calculate lines of communication, use the following formula, where n represents total number of stakeholders: n(n – 1) ÷ 2. Next, plug in 15 in place of the n to get the answer: 15(15 – 1) ÷ 2 = 105.