# Understand the problem

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# Start with hints

This is an application of multiplication property in combinatorics. The **rule of product** or **multiplication principle** is a basic counting principle (a.k.a. the **fundamental principle of counting**). Stated simply, it is the idea that if there are **a** ways of doing something and **b** ways of doing another thing, then there are **a** · **b** ways of performing both actions.

# Watch the video

# Connected Program at Cheenta

#### College Mathematics Program

The higher mathematics program caters to advanced college and university students. It is useful for I.S.I. M.Math Entrance, GRE Math Subject Test, TIFR Ph.D. Entrance, I.I.T. JAM. The program is problem driven. We work with candidates who have a deep love for mathematics. This program is also useful for adults continuing who wish to rediscover the world of mathematics.

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