Correct Answer - Option 1 : 31 years
Concept:
Range = Highest value - Lowest value
Calculation:
On arranging the age of the laborers working in the factory in ascending order, we get
23, 27, 28, 31, 33, 34, 35, 41, 42, 54
⇒ Highest value = 54
Also, Lowest value = 23
∴ Range = 54 - 23 = 31
Hence, the range of their age is 31 years.