Mathematics is like music – Enjoy it!!!
Question 1: The blood groups of 30 students of Class VIII are recorded as follows: A,B,O,O,AB,O,A,O,B,A,O,B,A,O,O, A,AB,O,A,A,O,O,AB,B,A,O,B,A,B,O. Represent this data in the form of a frequency distribution table. Which is the most common, and which is the rarest, blood group…
Read MoreStatistics – Bar graph, Histogram & Frequency polygon In this tutorial you will learn how to draw few very important and basic graphs in statistics. It is bit lengthy video that covers different scenarios like uniform classes, varying width classes,…
Read MoreExample 3: 100 plants each were planted in 100 schools during Van Mahotsava. After one month, the number of plants that survived were recorded as : 95 67 28 32 65 65 69 33 98 96 76 42 32 38…
Read MoreExample 1: Consider the marks obtained by 10 students in a mathematics test as given below: 55 36 95 73 60 42 25 78 75 62 The data in this form is called raw data. By looking at it in…
Read MoreQuestion 1: Give five examples of data that you can collect from your day-to-day life. Question 2: Classify the data in Q.1 above as primary or secondary data. Class 9 | Home Ex: 14.2 | Question 1
Read MoreStatistics This tutorial is recommended for the beginners to watch to understand the following: What is statistics Data Information Frequency distribution table Ungrouped Grouped Class Intervals Overlapping Non-overlapping Class limits Upper class limit Lower class limit
Read MoreQuestion 13: In Q.1, Exercise 14.2, you were asked to prepare a frequency distribution table regarding the blood groups of 30 students of a class. Use this table to determine the probability that a student of this class, selected at…
Read MoreQuestion 12: In Q.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. Using this table, find the…
Read MoreQuestion 11: Eleven bags of wheat flour, each marked 5kg, actually contained the following weights of flour (in kg): 4.97 5.05 5.08 5.03 5.00 5.06 5.08 4.98 5.04 5.07 5.00 Find the probability that any of these bags chosen at…
Read MoreQuestion 10: Activity : Ask all the students in your class to write a 3-digit number. Choose any student from the room at random. What is the probability that the number written by her/him is divisible by 3? Remember that…
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