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To find the number of combinations of 2 from two groups of 100 each, we can consider each group independently. From each group, we can choose 2 in ( \binom{100}{2} = \frac{100 \times 99}{2} = 4950 ) ways. Since there are two groups, the total number of combinations is ( 4950 + 4950 = 9900 ). Thus, the total number of combinations of 2 from the two groups is 9900.

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1mo ago

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