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Date November 2016 Marks available 2 Reference code 16N.1.SL.TZ0.T_8
Level Standard Level Paper Paper 1 (with calculator from previous syllabus) Time zone Time zone 0
Command term Find Question number T_8 Adapted from N/A

Question

Passengers of Flyaway Airlines can purchase tickets for either Business Class or Economy Class.

On one particular flight there were 154 passengers.

Let x be the number of Business Class passengers and y be the number of Economy Class passengers on this flight.

On this flight, the cost of a ticket for each Business Class passenger was 320 euros and the cost of a ticket for each Economy Class passenger was 85 euros. The total amount that Flyaway Airlines received for these tickets was 14 970 euros .

The airline’s finance officer wrote down the total amount received by the airline for these tickets as 14 270 euros .

Use the above information to write down an equation in x and y .

[1]
a.

Use the information about the cost of tickets to write down a second equation in x and y .

[1]
b.

Find the value of x and the value of y .

[2]
c.

Find the percentage error.

[2]
d.

Markscheme

* This question is from an exam for a previous syllabus, and may contain minor differences in marking or structure.

x + y = 154    (A1)     (C1)

[1 mark]

a.

320 x + 85 y = 14 970    (A1)     (C1)

[1 mark]

b.

x = 8 ,   y = 146    (A1)(ft)(A1)(ft)     (C2)

 

Note:     Follow through from parts (a) and (b) irrespective of working seen, but only if both values are positive integers.

Award (M1)(A0) for a reasonable attempt to solve simultaneous equations algebraically, leading to at least one incorrect or missing value.

 

[2 marks]

c.

| 14270 14970 14970 | ×   100    (M1)

 

Note:     Award (M1) for correct substitution into percentage error formula.

 

= 4.68 ( % )   ( 4.67601 )      (A1) (C2)

[2 marks]

d.

Examiners report

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b.
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c.
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d.

Syllabus sections

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