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3 years ago

How many ways can 3 DVDs be selected for playing if they are to be chosen from 6 different DVDs? Order is not important,

SAT

1 answer:

Sholpan [36]3 years ago

4 0

Answer:

i only found for 2 DvDs so here u go

210

105

Explanation:

Explanation:

We assume that someone will not buy two of the same DVD.

For the first DVD, there is a choice of 15 , but once the first is bought, there is a choice of 14 for the second one.

There are

choices =

210

However, this does not take order into consideration .... the 2 DVD's might be the same, just bought in a different order, so we need to divide this number by 2 to avoid the duplicates.

210

2 = 105

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