1.

Fill in the blanks:15C8 + 15C9 – 15C6 – 15C7 = ______.

Answer»

Formula:-

nCr=nCn-r

15C8+15C9-15C6-15C7

=15C15-8+15C15-9-15C6-15C7

=15C7+15C6-15C6-15C7=0



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