Communication matrices

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How many ways are there to get to F?

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Which Matrix shows this information

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Which Matrix shows the 2-step pathway from this information

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The matrix below shows when communication exists between people in the group Abe, Bob, Chloe and Diana. Communication between two people is shown by a 1 and no communication by a 0. How many people does Diana communicate with?

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The matrix below shows when communication exists between people in the group Evan, Fiona, Greg and Han. Communication between two people is shown by a 1 and no communication by a 0. How many people does Greg communicate with?

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