First slide
Combinations
Question

In a shop there are five types of ice-creams available. A child buys six ice-creams.

Statement 1: The number of different ways the child can buy the six ice-creams is  10C5.

Statement 2: The number of different ways the child can buy the six ice-creams is equal to the number of different ways of arranging 6 A’s and 4 B’s in a row.

Moderate
Solution

x1+x2+x3+x4+x5=65+61C51=10C4

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