Question

In the product $5mab$,

(i) $5$ is the numerical coefficient of $mab$.

(ii) the coefficient of $ab$ is $5m$.

(iii) $m$, $a$ and $b$ are the only factors.

• A. All of (i), (ii) and (iii) are correct.
• B. Only (i) and (ii) are correct.
• C. Only (i) and (iii) are correct.
• D. Only (ii) and (iii) are correct.

Answer 1

The correct option is B

Only (i) and (ii) are correct.

Each constant and each literal multiplied together to form a product is called a factor of that product. In a product, if a factor is a numerical quantity, it is called a numerical coefficient of the remaining factors, and if a factor involves variables, it is called a literal coefficient of the remaining factors.

The given product is $5mab$. Since $5$ is a numerical quantity, it is the numerical coefficient of the remaining factors, which is $mab$. Hence (i) is correct.

Also, (ii) is correct as $ab$ is the coefficient of $5m$ in $5mab$.

(iii) is not correct as $m$, $a$ and $b$ are not the only factors.