Answer:
495ways
Explanation:
Since we are selecting 4 members as part of the executive out of total of 12 more members, this can be done in 12C4 ways since combination has to do with selection.
Generally, nCr = n!/(n-r)!r!
12C4 = 12!/(12-4)!4!
12C4 = 12!/8!4!
12C4 = 12×11×10×9×8!/8!4!
12C4 = 12×11×10×9/4×3×2
12C4 = 495ways
Selection of President, Vice President, Secretary, and Treasurer out of the members can be done in 495ways