Cost of 2 lemons = $ 20.50
We have to find the cost of 7 lemons. We will use unitary method to solve this problem. The unitary method is a technique which is used for solving a problem by finding the value of a single unit, i.e., 1, (by dividing) and then finding the necessary value by multiplying the single unit value.
Since, Cost of 2 lemons = $20.50
Cost of 1 lemon = $ [tex] \frac{20.50}{2} [/tex]
Cost of 1 lemon = $ 10.25
Cost of 7 lemons = $ [tex] 7 \times 10.25 [/tex]
So, Cost of 7 lemons = $ 71.75
Therefore, she will pay $71.75 for 7 lemons.
