AP EAMCET · Maths · Permutation Combination
In an apartment there are 30 kids. If each kid plays table tennis with other kid, then the total number of matches played by them
- A \({ }^{30} \mathrm{C}_2\)
- B \({ }^{30} P_2\)
- C \({ }^{30} \mathrm{C}_2-1\)
- D \({ }^{30} P_2-1\)
Answer & Solution
Correct Answer
(A) \({ }^{30} \mathrm{C}_2\)
Step-by-step Solution
Detailed explanation
The number of required matches played is same as the number ways to choose two kids among 30 kids and it is equal to \({ }^{30} C_2\).
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