Write your creative piece first rather than writing a new one every single time. Ensure you story can link to any syllabus point about your AOS (assuming its discovery) and that it is not too specific. The best way to make your story very adaptable is to make the plot more figurative and less...
Selecting Team 1:
7C3 (1 of the 2 people is not selected in the same group as the other one and one of the 2 must be picked. Order doesnt matter so no need to divide by 2)
Selecting Team 2:
5C4 (The second person is included in here after the 4 (including one of the 2) have been selected...
For ii)
If that's the exact wording of the question, then i think it would be 6!/3! as mentioned but then multiplied by 2 to account for the C and R switching places
Generally,
It is a good idea to remember the equation of the tangent to ellipse and hyperbola. Either they give u normal or u prove it so no point remembering that. Chord of Contact isn't used that often but you should probably remember that in case.
how many ways can you arrange 6 A’s and 6 B’s around a circular table
i did 11!/6!6! which is 77 but the answer says 79
any ideas or could it be a typo ?
thanks