2. How many ways can 3 boys and 3 girls sit in a row if all the boys sit together, and all the girls sit together. 3. Seven points are marked on a circle. How many quadrilaterals can be formed using any 4 of the 7 points?
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How many ways can 3 boys and 3 girls sit in a row if all the boys sit together; and all the girls sit together? First, we can consider the boys as a single entity and the girls as another single entity. Then, we have two entities to arrange in a row. The number Show more…
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