Question

2. The measurements (in mm) of the diameters of the head of the screws are given below:
Diameter (in mm) 33-35 36-38 39-41 42-44 45-47
Number of screws 10 19 23 21 27
Calculate the mean diameter of the head of the screw by assumed mean method.
Solution :​

Answer 1

Answer:

the mean diameter of the head of the screws is 40.54 mm

Answer 2

Answer:

the correct answer of this question is 40.24 mm