5.The following gives the data regarding accident occurring a certain period : Number of accident 1 2 3 4 5 6Frequency: 19 22 31 9 3 2On how many days, three or less accidents occurred ?

The correct answer is (a).

The frequency of 1 is 19, the frequency of 2 is 22, and the frequency of 3 is 31. This means that on 19 days, there was 1 accident, on 22 days, there were 2 accidents, and on 31 days, there were 3 accidents. In total, on 72 days, there were 3 or less accidents. However, we need to subtract the number of days with 0 accidents, which is 19. Therefore, on 8 days, there were 3 or less accidents.

Option (b) is incorrect because it is the total number of days in the period. Option (c) is incorrect because it is the total number of accidents that occurred. Option (d) is incorrect because it is the total number of days with 3 or less accidents, plus the number of days with 0 accidents.