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Sunday, April 30 2017 @ 12:08 AM CDT
 Forum Index >  Test Paper Related >  Primary 5 Matters
 P5 Maths - Decimal Questions
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By: geniuskids (offline)  Saturday, August 11 2012 @ 12:06 AM CDT (Read 1441 times)  
geniuskids

Hi there, please help solve the following questions:-

(1) The admission fee for an exhibition was $8.50 for each adult and $3.50 for each pupil. A total of $5120 was collected. If 160 more pupils than adults visited the exhibition, how many pupils visited the exhibition?

Answers given - 540 pupils


(2) Fiona bought some oranges and 8 mangoes for $30.80. For every mango she bought, she could buy 4 oranges with the same amount of money. A mango cost $2.10 more than an orange.
(a) What was the cost of each type of fruit?
(b) Express the number of oranges as a fraction of the total numbers of fruits bought.

Answers (a) - Orange -$0.70 / Mango-$2.80
(b) 3/5

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By: jo sarah (offline)  Saturday, August 11 2012 @ 10:25 AM CDT  
jo sarah

(1) 160 pupils' admission fees = $160 x 3.5 = $560
take that from total: $(5120 - 560) = $4560
Now, $(8.5 + 3.5) = $12
and, $4560 / $12 = 380
i.e, 380 adults and (380 + 160) = 540 pupils visited the exhibition.

(2) (a) price of 1 mango (1u) = 4 x price of a mango (4u)
a mango cost $2.10 more than an orange
that would mean 3u = 2.10
and so, 1u = 0.70
thus, a mango cost $2.80 and an orange $0.70

(b) 8 mangoes cost $2.8 x 8 = $22.40
thus, $(30.80 - 22.40) = $8.20 was the cost of oranges
so that, no. of oranges = $8.4 / $0.7 = 12
therefore, fraction of oranges = 12/20 = 3/5

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