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Question
| Month | PX | QX | PY | QY | PZ | QZ |
| Jan | $10 | 100 | $20 | 50 | $25 | 200 |
| Feb | 10 | 90 | 18 | 60 | 25 | 225 |
| Mar | 10 | 70 | 15 | 90 | 25 | 275 |
| Apr | 12 | 50 | 15 | 100 | 25 | 290 |
| May | 15 | 25 | 15 | 120 | 25 | 320 |
In the above table, the cross price elasticity of demand for good Z with good Y when P Y rises from $15 to $18 is
A) -2.20.
B) +2.20.
C) +1.10.
D) -1.10.
Answer
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