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natalie0908
19.03.2021 •
Mathematics
Exercise 8.3.4: Selecting coders for 3 different projects. About (a) A manager must select three coders from her group to write three different software projects. There are 7 junior and 3 senior coders in her group. The first project can be written by any of the coders. The second project must be written by a senior person and the third project must be written by a junior person. How many ways are there for her to assign the three coders to the projects if no person can be assigned to more than one project
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Ответ:
168 ways
Step-by-step explanation:
Given
Required
Number of ways 3 project can be assigned
Starting with the second project.
This can be assigned to only senior coders
So:
Then, the third project.
This can be assigned to only junior coders
So:
At this point, we are left with 2 senior coders and 6 junior coders
Since the first can be assigned to anybody.
The number of selection is then calculated as:
Ответ:
I do. Need help using it?
Step-by-step explanation: I'll be more than happy to help