Compute the following: 70 + (-20) + (-30)

-120

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-20

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120

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Solution

The correct option is D 20
70 + (-20) + (-30)
= 70 - 20 - 30
= 50 - 30
= 20

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Similar questions

Compute mean deviation from mean of the following distribution :

$\begin{matrix} Marks & 10 - 20 & 20 - 30 & 30 - 40 & 40 - 50 & 50 - 60 & 60 - 70 & 70 - 80 & 80 - 90 No. of students & 8 & 10 & 15 & 25 & 20 & 18 & 9 & 5 \end{matrix}$

Q. Compute the mean by short cut method of the following frequency distribution

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Q. Compute the mean of the following frequency distribution:

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$1 - 9$	$4$
$10 - 19$	$3$
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Question 60

Compute each of the following:

(a) 30 + (-25) + (-10) (b) (-20) + (-5)

(e) 1 + (-2) + (-3) + (-4) (f) 0 + (-5) + (-2)

(g) 0 - (-6) - (+6) (h) 0 - 2 - (-2)

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Compute the following: 70 + (-20) + (-30)

The correct option is D 2070 + (-20) + (-30) = 70 - 20 - 30 = 50 - 30 = 20

The correct option is D 20
70 + (-20) + (-30)
= 70 - 20 - 30
= 50 - 30
= 20