Each Friday afternoon, Xiang and Lin both hand out coupons on campus for discount meals at a restaurant located in downtown Iowa City. The restaurant pays Xiang and Lin for their services: Depending on the number of coupons redeemed (used) by customers, Xiang and Lin possibly earn either nothing, $20 (this happens on 20% of Fridays for Xiang and on 40% of Fridays for Lin), or $40 (this happens on 40% of Fridays for Xiang and on 20% of Fridays for Lin.) Xiang works east of the river and Lin works west of the river so their earnings are independent. Find Xiang's mean earnings per Friday.
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
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Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.
Each Friday afternoon, Xiang and Lin both hand out coupons on campus for discount meals at a restaurant located in downtown Iowa City. The restaurant pays Xiang and Lin for their services: Depending on the number of coupons redeemed (used) by customers, Xiang and Lin possibly earn either nothing, $20 (this happens on 20% of Fridays for Xiang and on 40% of Fridays for Lin), or $40 (this happens on 40% of Fridays for Xiang and on 20% of Fridays for Lin.) Xiang works east of the river and Lin works west of the river so their earnings are independent.
Find Xiang's mean earnings per Friday.
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