Hi,

fraternity of 32 members with 8 taking neither math or physics

 Of the 24, 5 took both.  24 - 5 = 19 taking one.  18 taking just Math.

 Just 1 took only Physics.



checking our answer:

 just Math     18

 just Physics   1

     both       5

  neither       8

    total      32

   just physics = 32 - 8 -5 -18 = 1 

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