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Question
What is a variable?
A
A symbol that takes a fixed numerical value.
B
A symbol that takes various numerical value.
C
A symbol some time fixed and some time variable.
D
cannot be determined.
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Solution
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Correct option is B)
A variable is a symbol or letter, such as
$x$
or
$y$
, that represents a value. In algebraic equations, the value of one variable is often dependent on the value of another. Hence it's a symbol that takes various numerical values.
e.g. in the polynomial
$x+5,x$
is a variable.
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