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Bunuel
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The total expenses of organizing a party has a fixed expense of $250 a 17 Feb 2022, 08:15
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100% (00:58) correct 0% (00:00) wrong based on 23 sessions

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The total expenses of organizing a party has a fixed expense of $250 as the rent of the place where the party is to be organized and a variable expense depending on the number of guests attending the party. For 10 guests the total expense was estimated to be $650. What is the estimated total expense for 20 guests?

(A) $800
(B) $900
(C) $1050
(D) $1250
(E) $1300
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C
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The total expenses of organizing a party has a fixed expense of $250 a 17 Feb 2022, 08:31
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total expense
250+10*(x)=650
where x is the variable expense
x=40
so for 20 guests
250+20*40 = 1050
option D

Bunuel
The total expenses of organizing a party has a fixed expense of $250 as the rent of the place where the party is to be organized and a variable expense depending on the number of guests attending the party. For 10 guests the total expense was estimated to be $650. What is the estimated total expense for 20 guests?

(A) $800
(B) $900
(C) $1050
(D) $1250
(E) $1300
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The total expenses of organizing a party has a fixed expense of $250 a 17 Feb 2022, 08:33
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This problem can be solved in 2 ways
First total expense = fixed sum(250) + Variable (for 10 peple)
650=250+10x
650-250=10x
400=10x
40=x cost per person

For 20 people
=250+(20*40)
= 250 +800
=1050 option c correct ans

Second method alternate
For 10 people if cost is 650 then 1300 seems to be trap ans. ( Those not reading correctly)
So plugging in number if we start by option b 900 =
650 +250 (mistake in reading question)
Option c= 650+650-250= 1300-250 =1050( removing one fixed cost component from value of 10)

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Bunuel
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