Mathematics: Lucy Furr must supply 4 different bags of chips for a party. She finds 13 varieties at her local grocer. How many different selections can she make?

Lucy Furr must supply 4 different bags of chips for

lauriepdx17

26.01.2022

715

Step-by-step explanation:

What we must do is apply the concept of combinations, which is the following formula:

nCr = n! / r! * (n - r)!

Where 'n' represents the number of elements available and 'r' represents the number of elements chosen.

In this case, n equals 13 and r equals 4.

replacing in the formula:

13C4 = 13! / 4! * (13 - 4)!

13C4 = 13! / (4! * 9!)

13C4 = 715

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Milanchik28

26.01.2022

Number of selections she can make = 715

Step-by-step explanation:

Number of bags she must supply = 4

Number of varieties = 13

Number of selections = 13C4

$nCr = \frac{n!}{(n-r)!r!}$

$13C4 = \frac{13!}{(13-4)!4!} \\13C4 = \frac{13!}{9!4!} \\13C4 = \frac{13*12*11*10}{4*3*2*1} \\13C4 = 13 * 11 * 5 \\13C4 = 715$

Number of selections she can make = 715

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shygrl05

19.06.2022

Her method will produce a valid sample.

Her method will produce a random sample.

Her method will produce a representative sample.

Step-by-step explanation:

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