 Hi and how are you all today? The question says refer to table 14.7 chapter 14 and these two are the questions that we need to answer. First of all find the probability that the student obtain less than 20% in the mathematics test and next find the probability that the student obtain marks 60 and above. Now let us proceed on with our solution. Now for the first part the number of students obtaining less than 20% marks in mathematics. 20% out of 100 means marks, number of students obtaining marks between 0 to 20 and that is given to us as 7. So there are 7 such students. Further total number of students equal to the total is given to us as 90. So the required probability is 7 students out of 90 are obtaining less than 20% marks in mathematics. So this is the answer to the first part. In the second part we need to find out the probability that the student obtaining marks 60 or above. So the number of students obtaining 60 marks or above are there are plus 8. 15 students are obtaining marks more than 60 and less than 70 and 8 marks are of 8 students are obtaining marks more than 70. So the total 15 plus 8, 15 plus 8 that is 20 again the total number of students are 90. So our required probability is equal to 23 by 90. So this is the answer to the second part. This completes my session. Hope you enjoyed and have a good day.