Answer:
Option D) a = 36, b = 36
Step-by-step explanation:
We are told in the question that Hassan predicted that he would sell 178 postcards. He actually sold 142 postcards.
In the diagram above,
a = Error
b = Absolute Error
Error in mathematics is calculated as:
Approximately or Predicted value - Actual value
For Hassan,
His predicted value = 178
Actual value of postcards sold = 142
Error = 178 - 142 = 36
Likewise, the formula for Absolute error Absolute Error = |Actual Value - Measured or predicted Value|
It is important to noted that Absolute Error is always positive
Actual value = 142
Predicted value = 178
Absolute Error = |142 -178|
= |-36|
Absolute Error is 36
Therefore, Option D) a = 36, b = 36 is the correct option.
