Answer:
132
Explanation:
Each month there are 11 dates that can give valid but different date. for example in Jan
1/2, 1/3, 1/4, 1/5, 1/6, 1/7,1/8, 1/9, 1/10, 1/11, 1/12
1/13--- 1/31 can't be misread.
Same is the case of rest of the 11 months.
So the number of dates that can be misread are: 11 × 12= 132