problems on simultaneous equations with three variables

If two or more forces act on the same body, then the acceleration of the body can be written as the vector sum of the individual accelerations produced by each force. The acceleration of the body can be better expressed as the acceleration caused by the resultant force. ..

There can be several r.v's associated with an experiment. A random variable which can assume only a finite number of values or countably infinite values is called a discrete random variable. e.g., Consider a random experiment of tossing three coins simultaneously. Let..

A variable circle of radius 3 cm passes through a fixed point A. Which of the following is the locus of the center of the moving circle? => Figure 1 or Figure 2 or Figure 3 or Figure 4..

'>Framing of Formulae A formula is formed by using: (a) mathematical symbols and variables (b) given conditions, and (c) simplification. Indices If m is a positive integer, a x a x a .... m times is written as am. a is called the base and m is the power. We read it as "a raised to the pow..

In a two-way ANOVA, variable A has three levels and variable B has two levels. The number of data values in each group is five. Find the degrees of freedom for factor A × B and for the within (error) factor. => 2, 24 or 4, 3 or 2, 1 or 3, 2..

The means of each group of a two-way analysis of variance for two independent variables are plotted and shown in the three graphs. Which of these represents an ordinal interaction? Consider the interaction to be significant. => Graph 2 or Both graph 1 and graph 2 or Graph 3 or G..

The mean time a student spends on a computer is 4 hours per day. Assume the standard deviation is 0.7 hour. Find the percentage of students who spend more than 4.3 hours on the computer. Assume the variable is normally distributed. => 66.56% or 88.44% or 33.36% or 16.56%..

Suggest possible confounding variables for the situation given. " Two groups of people consisting of 6 people each are given 2 special diets - a low- fat diet and a high-fat diet. After 3 months the blood pressures of the groups are compared to see if diet has any effect on bloo..

An automobile parts supplier wants to know how long car owners plan to keep their cars with them. A random sample of 20 car owners results in a standard deviation of 3.7 years. Find a 95% confidence interval for the variance and standard deviation. Assume that the variable is no..

List all the possible outcomes when two coins are tossed simultaneously. => HT and TH or HH and TT or HH, HT, TH, and TT or None of the above..