Class 8th CBSE Mathematics
Data Handling + Pie Chart Free Online Classroom JSUNIL TUTORIAL for 8th 9th & 10th
1. If a die is thrown once, what is the probability of getting a prime number? 2. A coin is tossed 200times and tail is obtained 128 times. Now, if a coin is tossed at random, what is the probability of getting a tail? 3. In 100 throws of a dice, 5 is obtained 42 times. In a random throw, what is the probability of getting a 5? 4. A bag has 6 red balls and 8green balls. A ball is drawn from a bag without looking in to the bag. What is the probability of getting a green ball? 5. What is the probability of occurrence of an event? 6. If a dice is thrown. What is the probability of getting: (i) an odd number (ii) a multiple of 3 (iii) a perfect square numbers (iv) a number less than 4? 7. Three unbiased coins are tossed together. Find the probability of getting: (i) all heads (ii) two heads (iii) one head (iv)At least two head [ hint : Possible outcomes are HHH, HHT, HTH, HTT, THH, THT, TTH and TTT Ans: 1/8 , 3/8 , 3/8,1/2(HHH, HHT, HTH and THH)] 8. Find the probability that a leap year selected at random will contain 53 Sundays.[2/7] 9. One card is drawn from a pack of 52 cards, each of the 52 cards being equally likely to be drawn. Find the probability that the card drawn is : (i) an ace (ii) either red or king (iii) a face card (iv) a red face card) [ 1/13, 7/13, 3/13,3/26] 10. Two dice are thrown simultaneously. Find the probability of getting: (i) a doublet i.e. same number on both dice. (ii) The sum as a prime number.[n=6 1/6,5/12] --------------------------------------------------------------------- Read more question for practice : View Work sheet:Maths - Chapter: Probability View
Pie Chart 1. There are 216workers in a factory and in which 75 are laborers. What would be the central angle of the sector representing laborers in the pie chart ?
2. If 45%of the people residing in a locality are Hindus, then what is the central angle of the sector representing the Hindus in the pie chart? 8. The weekly pocket expenses (in rupees) of 30students of a class are given below: 62 ,80 ,110 ; 75 ; 84 ; 73 , 60 , 62, 100 , 87 , 78 , 94 ,117, 86, 65, 68,; 90,; 80,118 ,72; 95; 72; 103; 96; 64; 94; 87; 85; 105; 115 Construct a frequency table with class intervals 60-70 and so on.
3. The marks of a student in different subject are given below: Represent the below data by a bar graph. Subject Maths Science Hindi English Social science Marks 75 70 50 55 65 4. The monthly income of a family is Rs14400. The monthly expenditure of the family on various items is given below. Represent the given data by a pie chart. Item: Food Clothing Education Savings Expenditure Rent 4000 5400 2800 1800 400
5. The data on religion wise division of 1080 workers of a factory are given below: Represent the given data by a pie chart. Religion Hindu Muslim Sikh Christian Numbers of workers 450 270 255 105
Visualizing Solid Figure 1. In a polyhedron there are 8 vertices and 12 edges find its no. of faces. 2. In a polyhedron there are 8 edges and 5 faces find its no. of vertices. 3. In a polyhedron there are 5 faces and 6 vertices find its no. of edges. 4. A polyhedron has 8 faces, 12 vertices find its no. of edges. 5. A polyhedron has 6 edges and 4 faces find its no. of vertices. 6. A polyhedron has 7 vertices and 12 edges. Find its no. of faces. Answer: 1. 6 2. 5 3. 9 4. 18 5. 4 6. 7