Give this relationship in the roaster form. If the statement is false, write that statement correctly. Find the domain and the range. Class 8 Maths Chapter 15 — Important Questions Extra Questions for Practice 1. In previous classes, we learned what data is, what mean, median, mode is. Is it true or false? If the standard deviation of the observations is 2, then find the value of a. Find Z in roster form.
See the solutions of other chapters of or go to of the page. Calculate the mean and variance for the given frequency distribution. Calculate the mean and variance for the following frequency distribution. Also calculate the probability of taking out a non-defective egg from the lot. A die is numbered in such a way that its faces show the numbers 1, 2, 2, 3, 3, 6. In 1654, a gambler by name Chevalier de Mere approached the well-known 17th century French philosopher and mathematician regarding certain dice problems. Other exercises like or Solutions are also available.
Who has the better chance to get the number 25? In this chapter, we will find dispersion. Therefore, the team with lower standard deviation will be more consistent. All the given here are detailed and in easy to understand the simple steps. Give reason in support your answer. A person wins if the mean of numbers are written on the slip. First a topic is explained, and then their questions of that topic - from easy to difficult.
Median is the mean of 13th and 14th observations. Therefore, the prices of shares Y are more stable than the prices of shares X. From the prices of shares X and Y below, find out which is more stable in value. Find which team may be considered more consistent? Other exercises like or Solutions are also available. Ncert solution class 10 Maths includes text book solutions from Mathematics Book. Calculate the mean and variance for the first 10 multiples of 3. Forming a good base in Class 11 is important for good marks Class 12 Boards.
In this chapter, we will study how do we find dispersion. Calculate the mean deviation about the mean for the given data x i 10 10 15 20 25 f i 7 4 6 3 5 Q7. Calculate the mean deviation about the mean for the given data 39, 71, 49, 41, 43, 56, 64, 47, 55, 45 Q3. Find the mean and standard deviation using short cut method. What will be the probability that square of this number is less than or equal to 1? Let there be x blue balls in the bag. This work was the beginning of probability theory. Section Name Topic Name 2 Relations and Functions 2.
See the solutions of other chapters of or go to of the page. Out of these 12 balls, one can be chosen in 12 ways. Find the probability that the card drawn is neither an ace nor a king. If one ball is drawn at random from the box what is the probability that it will be a black ball? Find the set Z and also the remaining elements of Z × Z. Complete the following table which gives a few values of the total score on the two throws: What is the probability that the total score is i even? If three of the observations are 1, 2 and 6.
Since its inception, the study of and probability has attracted the attention of great mathematicians James Bernoulli 1654 — 1705 , A. Therefore, 20 -30 is the median class. If one disc is drawn at random from the box, find the probability that it bears i a two digit number ii a perfect square number iii a number divisible by 5. And, for the red graph, they are very close to the mean, they are less dispersed from the mean. See the solutions of other chapters of or go to of the page. From the data given below state which group is more variable, A or B Marks 10 — 20 20 — 30 30 — 40 40 — 50 50 — 60 60 — 70 70 — 80 Group A 9 17 32 33 40 10 9 Group B 10 20 30 25 43 15 7 Q2. Other exercises like or Solutions are also available.
If 6 more black balls are put in the box, the probability of drawing a black ball is now double of what it was before. Calculate the mean and variance for the first n natural numbers. Calculate the mean deviation about the mean for the given data 5, 8, 9, 10, 11, 13, 14, 18 Q2. What is the probability of Rohan picking a card without seeing, that has the number 2 on it? Find the probability of getting a prize. Calculate mean and variance for the given data 6, 7, 10, 12, 13, 4, 8, 12 Q2.
Given: 1, 2, 3, 4, …………. . Find the following relation: i In set-builder form ii In roster form. Calculate the mean deviation about the median for the given data: 36, 46, 60, 53, 51, 72, 42, 45, 46, 49 Q5. X 35 54 52 53 56 58 52 50 51 49 Y 108 107 105 105 106 107 104 103 104 101 Q3. Both of these observations lie in the cumulative frequency 14, for which the corresponding observation is 7. Find P × Q and then find how many subsets will P × Q have? A card is drawn from the remaining cards.