Question 1104217
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If there are n people in the organization, then there are n choices for president, and then there are (n-1) choices for secretary.  So the number of ways of electing a president and a secretary is n(n-1).<br>
The problem says there are 210 different ways this can be done, so
{{{n(n-1) = 210}}}<br>
The easiest way to solve for n is by trial and error; n is 15.<br>
There are 15 members in the organization.