From 4 officers and 8 jawans in how many ways can 6 people be chosen i To include exactly - Maths - Permutations and Combinations

Question

From 4 officers and 8 jawans in how many ways can 6 people be
chosen i To include exactly one officer ii To include at least one
officer

Nikhil Ginodia · Accepted Answer

i 4C1x8C5
ii There are four cases:-
a 4C1x8C5
b 4C2x8C4
c 4C3x8C3
d 4C4x8C2

From 4 officers and 8 jawans in how many ways can 6 people be chosen i. To include exactly one officer ii. To include at least one officer