Question

Find 7 out of 3 days with repeation ways to choose​

Answer 1

11 days

Step-by-step explanation:

11 days is correct answer

Answer 2

Concept:

A permutation is a set of things arranged in a certain sequence. The members or components of sets are organized in this diagram in a linear or sequential manner.

Given:

Total days = 7.

The number of days to choose = 3.

Find:

Ways to choose 3 days.

Solution:

The number of ways to choose 3 days from 7 days is $^7P_3$.

$^7P_3 = \frac{7!}{4!}\\ ^7P_3 = 7*6*5\\^7P_3 = 210$

Hence, the number of ways to choose is 210.