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31 October, 22:58

Every week 3 members of a cooking club total their food cost and determine the mean amount that each person should contribute. This week, the mean contribution per member is $30. A fourth person who wants to join the cooking club buys $20 worth of food. What is the mean contribution for this week if the fourth person joins the cooking club.

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  1. 31 October, 23:02
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    3 members have a mean of $30 and thus a total amount of $90. If a fourth person contributes $20 to the total then the answer would be $110/4 people which is $27.50 per person.
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