22 January, 15:19

# How many different ways can 4 rolls of film be selected from 50 rolls? (Permutation and combination question)

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Answers (1)
1. 22 January, 16:31
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Number of ways to chose rolls = 5,527,200

Step-by-step explanation:

Given:

Total number of films rolls (n) = 50

Selected number of films rolls (r) = 4

Find:

Number of ways to chose rolls.

Computation.

Permutation problem.

Number of ways to chose rolls = n! / (n! - r!)

Number of ways to chose rolls = 50! / (50! - 4!)

Number of ways to chose rolls = 50! / (46!)

Number of ways to chose rolls = 50 * 49 * 48 * 47

Number of ways to chose rolls = 5,527,200
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