A group of 4 people make toys. The group has made 10 toys in total. On 10 of the

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A group of 4 people make toys. The group has made 10 toys in total. On 10 of the toys, 2 people have solely contributed, on 8 of the toys, 3 people contributed & on 2 of the toys all 4 people contributed. What is the percentage of contribution each person should be credited with?

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