Ques 3 ,4 and 5
Percentage
A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.
Algebraic Expressions
In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.
Numbers
Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.
Subtraction
Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.
Addition
Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.
Ques 3 ,4 and 5
![3. If the median of the dataset xi, i = 1,2, ..., n, is 12, what is the median of the dataset
3x; + 4, i = 1,.., n?
62
[1]
A The sample mean and sample variance of five data values are, respectively 13.6 and 25.8.
TEthree of the data values are 7, 13 and 20, what are the other two data values?
[3]
- The sample standard deviation of the dataset 2, a, 12, 18, and 30 is 10.8 (correct upto
e decimal place), where a is an unknown quantity. Then, the value of the sample
jence of the new dataset that is obtained by adding 5 to each number of the given
dataset is
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