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Umnica [9.8K]
3 years ago
11

1. Anita plans to give her husband 4 shirts for his birthday. She narrows the search to 4 shirts from a selection of 15 shirts a

t Dillon's Store or 4 from a selection of 20 shirts at The Men's Shop. In how many ways can she select the shirts
Mathematics
1 answer:
Dimas [21]3 years ago
8 0

Answer:

6210

Step-by-step explanation:

This is simple problem of section of few things from  a lot.

A_{1}: selection of 4 shirts from 15 shirts

A_{2}: selection of 4 shirts from 20 shirts

A_{1} =   \binom{15}{4}= \frac{15!}{4!\times11!}

=1365

A_{2} =   \binom{20}{4}= \frac{20!}{4!\times16!}

=4845

so the number of ways in which she can select shirts

= 1365+4845= 6210

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