musical piece problem 164

timer Asked: Aug 19th, 2014
account_balance_wallet $5

Question Description

For the orchestra contest, Mrs. Treble is going to collect 4 pieces of music from the recommended list of 20 pieces. How many combinations of 4 pieces of music are possible?

Tutor Answer

School: University of Virginia

Number of combinations =20C4 = 20*19*18*17/(4*3*2*1)= 5*19*3*17=4845 

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