Delhi Police Constable Exam Model Paper 9

Calculation:
First 50 whole numbers are 1, 2, 3, ... , 49
Numbers in which 2 appear (first 50 whole numbers) are = 2, 12, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 32, 42Hence, total times = 15 times
Mistake point: 2 will appear twice in 22.