 Hi and how are you all today? The question says in question 5 exercise 14.2 you were asked to prepare a frequency distribution table regarding the concentration of sulphur dioxide in the air in parts per million of a certain city for 30 days, right? Using the table now find the probability of concentration of sulphur dioxide in the interval 0.1. 1, 2 to 0.16 on any of these days. Now if you refer back to this question first of all the number of days that is the total is given to us as 30 days. And if you look at the frequency distribution table number of days in which the concentration of sulphur dioxide is in the interval 0.12 to 0.16 is 2. So the required probability is equal to 2 out of these 30 days which can be written as 1 over 15. And this is our required answer to this session. Hope you have a great day ahead. Bye for now.