Data Handling - Maths Class 8th - Ex 5.3 - Chapter 5 - NCERT - CBSE

Data Handling - Maths Class 8th - EXERCISE 5.3 - Chapter 5 - NCERT - CBSE Full Exercise on Data Handling, fully solved. This is a video tutorial for 8th class NCERT CBSE students. For other educational stuff, subscribe and press bell icon. Chance and Probability Sometimes it happens that during rainy season, you carry a raincoat every day and it does not rain for many days. However, by chance, one day you forget to take the raincoat and it rains heavily on that day. Sometimes it so happens that a student prepares 4 chapters out of 5, very well for a test. But a major question is asked from the chapter that she left unprepared. Everyone knows that a particular train runs in time but the day you reach well in time it is late! You face a lot of situations such as these where you take a chance and it does not go the way you want it to. Can you give some more examples? Getting a result You might have seen that before a cricket match starts, captains of the two teams go out to toss a coin to decide which team will bat first. What are the possible results you get when a coin is tossed? Of course, Head or Tail. Imagine that you are the captain of one team and your friend is the captain of the other team.You toss a coin and ask your friend to make the call. Can you control the result of the toss? Can you get a head if you want one? Equally likely outcomes: A coin is tossed several times and the number of times we get head or tail is noted. Let us look at the result sheet where we keep on increasing the tosses: Linking chances to probability : Consider the experiment of tossing a coin once. What are the outcomes? There are only two outcomes – Head or Tail. Both the outcomes are equally likely. Chance and probability related to real life: We talked about the chance that it rains just on the day when we do not carry a rain coat. What could you say about the chance in terms of probability? 2. Metrological Department predicts weather by observing trends from the data over many years in the past. Probability of Exit Polls. EXERCISE 5.3 1. List the outcomes you can see in these experiments. (a) Spinning a wheel (b) Tossing two coins together 2. When a die is thrown, list the outcomes of an event of getting (i) (a) a prime number (b) not a prime number. (ii) (a) a number greater than 5 (b) a number not greater than 5. 3. Find the. (a) Probability of the pointer stopping on D in (Question 1-(a))? (b) Probability of getting an ace from a well shuffled deck of 52 playing cards? (c) Probability of getting a red apple. (See figure below) 4. Numbers 1 to 10 are written on ten separate slips (one number on one slip), kept in a box and mixed well. One slip is chosen from the box without looking into it. What is the probability of . (i) getting a number 6? (ii) getting a number less than 6? (iii) getting a number greater than 6? (iv) getting a 1-digit number? 5. If you have a spinning wheel with 3 green sectors, 1 blue sector and 1 red sector, what is the probability of getting a green sector? What is the probability of getting a non blue sector? 6. Find the probabilities of the events given in Question 2. WHAT HAVE WE DISCUSSED? 1. Data mostly available to us in an unorganised form is called raw data. 2. In order to draw meaningful inferences from any data, we need to organise the data systematically. 3. Frequency gives the number of times that a particular entry occurs. 4. Raw data can be ‘grouped’ and presented systematically through ‘grouped frequency distribution’. 5. Grouped data can be presented using histogram. Histogram is a type of bar diagram, where the class intervals are shown on the horizontal axis and the heights of the bars show the frequency of the class interval. Also, there is no gap between the bars as there is no gap between the class intervals. 6. Data can also presented using circle graph or pie chart.A circle graph shows the relationship between a whole and its part. 7. There are certain experiments whose outcomes have an equal chance of occurring. 8. A random experiment is one whose outcome cannot be predicted exactly in advance. 9. Outcomes of an experiment are equally likely if each has the same chance of occurring. 10. Probability of an event = Number of outcomes that make an event/ Total number of outcomes of the experiment , when the outcomes are equally likely. 11. One or more outcomes of an experiment make an event. 12. Chances and probability are related to real life. #Class8 #DataHandling #NCERT #NcertSolutions #solvedexercises #teaching #CBSE #maths #MathematicsClass8th #PieChart #samrules #casino #ExitPolls #Probability #Weather Make sure to Subscribe and get the latest tutorials for your delight :) http://www.youtube.com/subscription_center?add_user=sumitsumo Make sure to check out our other Video Tutorials! Also, check us out when we're posting other helpful videos all throughout the week to help you tell more and grow more using online video.