 Hello and welcome to the session. My name is Mansi and I'm going to help you with the following question. The question says the following table gives the lifetimes of 400 neon lamps. In this column we have lifetime in hours and in this column we have number of lamps. So the first question is represent the given information with the help of a histogram and second is how many lamps have a lifetime of more than 700 hours. So first of all we see the solution to the first part. Now this is the graph here where x-axis is lifetime in hours and on the y-axis we have number of lamps. Now this graph shows the lifetime of 400 neon lamps. Now we will start making a histogram. So this is the required histogram. Now from here we can see at a glance that 14 lamps they have a lifetime of 300 to 400. Similarly here we have 56, 60, 86, 74, 62 and 48 neon lamps have a lifetime of 400 to 500, 500 to 600, 600 to 700, 700 to 800 and so on till 900 to 1000. Now let us answer the second part that is how many lamps have a lifetime of more than 700 hours. So that would be 74 plus 62 plus 48 because it is given to us in the question that 700 to 800 is 74, 800 to 962 and 900 to 1000 is 48 so we add 3 of them that will be equal to 184 and this becomes our answer to the second part. I hope that you understood the question and enjoyed the session. Have a good day.