Question 4 (d)

Find:

50 – (–40) – (–2)

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Solution

50 – (–40) – (–2)
= 50 + 40 + 2
= 92

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Question 67 (d)

Find the value of the given polynomial at m = 1, n = -1 and p = 2

mn + np + pm

\begin{matrix} Marks & 10 - 20 & 20 - 30 & 30 - 40 & 40 - 50 & 50 - 60 Number of students & 2 & 4 & 7 & 6 & 1 \end{matrix}

Question 50

$4^{2}$ is greater than $2^{4}$

Class	10-20	20-30	30-40	40-50	50-60
Frequency	2	3	9	4	2

:

X	$10 - 20$	$20 - 30$	$30 - 40$	$40 - 50$	$50 - 60$
F	$5$	$4$	$3$	$2$	$1$

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