Mathematics
Medium
Question
A group of 10 representatives is to be selected out of 12 seniors and 10 juniors. In how many different ways can the group be selected if it should have at least one senior?
A
²²C₁₀
B
²²C₁₀ + 1
C
²²C₉ + ¹⁰C₁
D
²²C₁₀ – 1
✓ Official correct answer
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A
²²C₁₀
No member explanations yet for this option.
B
²²C₁₀ + 1
No member explanations yet for this option.
C
²²C₉ + ¹⁰C₁
No member explanations yet for this option.
D
²²C₁₀ – 1
No member explanations yet for this option.