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A Debate Team of 4 Is to Be Chosen from a Class

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A debate team of 4 is to be chosen from a class of 35.There are two twin brothers in the class.How many possible ways can the team be formed which will include both of the twin brothers?


Definitions:

Conformation

The spatial arrangement of atoms in a molecule that can be altered by rotation around single bonds, without breaking chemical bonds.

Eclipsed Conformation

A molecular conformation where substituents on adjacent atoms align with each other, typically resulting in higher steric strain.

Staggered Conformation

An arrangement of atoms in a molecule where groups attached to adjacent carbons are as far apart as possible, minimizing steric strain.

Ethane

A simple alkane with the chemical formula C2H6, consisting of two carbon atoms single-bonded together, surrounded by hydrogen atoms.

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