A group of 10 friends wants to form a singing group, with a lead vocalist, a guitarist, and a drummer. How many different combinations of friends can fill these roles?
720
1020
930
480
Given that,
There are 10 friends who want to form a singing group.
The number of ways to choose a lead vocalist is 10 .
The number of ways to choose a guitarist is 9 .
The number of ways to choose a drummer is 8 .
Thus,
Therefore, the total number of ways to select 3 members for different roles is 720 .
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