i need help in math

A department in a workshop has 10 machines which may need adjustment from time to time during the day. Three of these machines are old, each having a probability of 1/11 of needing adjustment during the day, and 7 are new, having corresponding probabilities of 1/21. Assuming that no machine needs adjust..

need for measurement

For a set of 100 observations, taking assumed mean as 4, the sum of the deviation is-11 cm, and the sum of the squares of these deviation is $257\: cm^{2}$. Find the coefficient of variation. Sol. To find the value of C.V., we need to know the value of the mean and S.D. $\overline{x}=A+\frac{\sum d}{n}=4-\frac{11}{100}=3.89$ ..

Online Math Help with Math Tutors

With TutorNext's online Math tutoring and Math Homework Help , studying the subject becomes easy and fun. Under the expert guidance of our Math tutors, you get Math help and you can excel in all related Math problems . As our online math tutoring is one-on-one and ..

defining current mathematically

Figure 26-2 shows a complete circuit with a battery (or other power source) that maintains a constant potential difference across its terminals. In this case, charge pushed through the circuit by the battery flows through a conducting wire, and then through the filament of a bulb, which is usually a very thin wire. In order to think more ..

Need of Gauss' Theorem (or Law)

We can find the electric intensity due to a charged conductor like a uniformly charged sphere or a line of charge or an electric dipole using Coulomb's law. The electric intensity can also be determined using Gauss' law, except for electric dipole. This is because Gauss' law can be applied to uniform charge distribution having symmetry..

mathematical induction

Mathematical Induction is the process of proving a general theorem or formula involving positive integer $n$. 1. ${\displaystyle \Sigma n=1+2+3+\ldots+n=\frac{n(n+1)}{2}}$ 2. ${\displaystyle \Sigma n^{2}=1^{2}+2^{2}+3^{2}+.\cdots+n^{2}=\frac{n(n+1)(2n+1)}{6}}$ 3. ${\displaystyle \Sigma n^{3}=1^{3}+2^{3}+3^{..

mathematical treatment

. Thus, a coefficient of correlation must always be judged with regard to the nature of the variables with which we are dealing and the purpose for which r was computed. For example, an r of 0.30 between height and intelligence would be regarded as important, although, rather low, since correlations between physical and mental functions are usuall..

mathematical logic

Logic is the study and analysis of the nature of the valid arguments. It is the reasoning tool by which mathematicians draw valid inferences from a given set of facts..

Mathematical Induction

In Math Help , drawing mathematical or scientific conclusions, there are two basic processes of reasoning that are commonly used. These are induction and deduction..

Discrete Mathematics

Discrete mathematics plays an important role in mathematics in solving nad mathematical reasoning.The topics involved in grade 10 are: Modular Arithmetic Mathematical Reasoning Graph Theo..

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