SOLUTION: Out of a group of 25 students,
7 walk to school, 12 catch a train
and 6 catch a bus. If 6 students
are selected, find the number of
combinations if 3 walk to school and
1 catc
Algebra ->
Permutations
-> SOLUTION: Out of a group of 25 students,
7 walk to school, 12 catch a train
and 6 catch a bus. If 6 students
are selected, find the number of
combinations if 3 walk to school and
1 catc
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Question 1120103: Out of a group of 25 students,
7 walk to school, 12 catch a train
and 6 catch a bus. If 6 students
are selected, find the number of
combinations if 3 walk to school and
1 catches a bus.
The number of groups of 6 students, containing 3 walking and 1 catching a bus is
.
To get this number (and this solution), you must select 3 of 7; then select 1 of 6; and finally add to them 2 selected of 12.
