1. The class mark of the class 90 – 120 is :

9. Following table gives the distribution of students of sections A and B of a class according to the marks obtained by them. Represent the marks of the students of both the sections on the same graph by two frequency polygons. What do you observe? 1. The class mark of the class 90 - 120 [...]

7. 30 children were asked about the number of hours they watched TV programmes last week. The results are recorded as under : Can we say that the number of children who watched TV for 10 or more hours a week is 22? Justify your answer 1. The class mark of the class 90 - [...]

29. 80 bulbs are selected at random from a lot and their life time (in hrs) is recorded in the form of a frequency table given below : One bulb is selected at random from the lot. The probability that its life is 1150 hours, is 1. The class mark of the class 90 - [...]

1. The class mark of the class 90 – 120 is : 1. The class mark of the class 90 - 120 is : July 3, 2021 Category: Chapter 14 - Statistics , Chapter 15 - Probability , Maths , NCERT Class 9 ,