A mast has 4 flags of different colours. A signal uses… | StemPy Lab

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A mast has 4 flags of different colours. A signal uses… | StemPy Lab

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A mast has 4 flags of different colours. A signal uses at least 2 of them, hung one above another. How many signals are possible?

MathematicsHardHigh School (11–12)Algebra › Permutations and Combinations A-Level Board Exam IB

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A mast has $4$ flags of different colours. A signal uses at least $2$ of them, hung one above another. How many signals are possible?

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