In how many ways can 2 students be selected from a group ...
In how many ways can 2 students be selected from a group of 5 students in a debating competition?
25 ways
10 ways
15 ways
20 ways
Correct answer is B
In5C2ways=5!(5−2)!2!=5!3!2!=5×4×3!3!×2×1=10ways
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