Question

In: Finance

The table shows the total utility (TU) that James receives from consuming different amounts of two...

  1. The table shows the total utility (TU) that James receives from consuming different amounts of two goods X and Y, per month.

Quantity

TUx

MUx

MUx/Px

TUy

MUy

MUy/Py

0

0

0

1

50

75

2

88

117

3

121

153

4

150

181

5

175

206

6

196

225

7

214

243

8

229

260

9

241

276

  1. Fill in the other columns of the table by calculating the marginal utilities for goods X and Y and the ratios of marginal utilities to price for the two goods. Assume that the price of both goods X and Y is $3.
  1. If James allocates $30 to spend on both goods, how many units will he buy of each?

  1. How much will James spend on each good at the utility maximizing combination?
  1. How much total utility will James experience by buying the utility-maximizing combination?
  1. Suppose the price of good Y increases to $6. How many units of X and Y will he buy to maximize his utility now?

Solutions

Expert Solution

Quantity TUx MUx MUx/Px TUy MUy MUy/Py
0 0 0
1 50 50 16.67 75 75 25.00
2 88 38 12.67 117 42 14.00
3 121 33 11.00 153 36 12.00
4 150 29 9.67 181 28 9.33
5 175 25 8.33 206 25 8.33
6 196 21 7.00 225 19 6.33
7 214 18 6.00 243 18 6.00
8 229 15 5.00 260 17 5.67
9 241 12 4.00 276 16 5.33

James will buy those units which has highest MU dollar

he will buy 5 uints of both the products to maximise his utility by folllowing these rankings as shown in table

Quantity MUx/Px Rank MUy/Py Rank
1 16.67 2.00 25.00 1.00
2 12.67 4.00 14.00 3.00
3 11.00 6.00 12.00 5.00
4 9.67 7.00 9.33 8.00
5 8.33 9.00 8.33 10.00
6 7.00 6.33
7 6.00 6.00
8 5.00 5.67
9 4.00 5.33

3.) Spending on Utility Maximisation

X= 5*3 = 15

Y = 5*3 = 15

4)

Quantity MUx/Px MUy/Py
1 16.67 25.00
2 12.67 14.00
3 11.00 12.00
4 9.67 9.33
5 8.33 8.33
58.33 68.67

TOTAL = 58.33+68.67 = 127

5.

Quantity MUx/Px Rank MUy/Py Rank
1 16.67 1 12.50 3
2 12.67 2 7.00 7
3 11.00 4 6.00
4 9.67 5 4.67
5 8.33 6 4.17
6 7.00 8 3.17
7 6.00 3.00
8 5.00 2.83
9 4.00 2.67

X = 6 Units

Y = 2 Units

TOTAL EXPENSE = 6*3 + 2*6 = $30


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