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Hi, How many ways can at least two people be selected from a group of 10 people? a) 2 10 - 10 C 0 -

Hi,

How many ways can at least two people be selected from a group of 10 people?

a) 2¹⁰- ₁₀C₀- ₁₀C₁

b) 2¹⁰-1

c) ₁₀C₂+ ₁₀C₃+... + ₁₀C₁₀

d) both b and C

please explain answer. thank you

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