Mathematics ( 2 0 )

2008-08-21 1:05 am

Train Up Mathematics ( S1 to S2)

1. (P.24)
Fro a product,its marked price=$50,cost price=$40 and selling price=$36.
What percentage is the price marked up?

2. (P.92)
how can we estimate the total number of residents of a building?Write down
the method.

3.
Is it possible to find out the exact number of students in all the primary and
secondary schools in HK?Explain it briefly.

回答 (1)

Karin

2008-08-29 1:22 am

✔ 最佳答案

1. (P.24)
Fro a product,its marked price=$50,cost price=$40 and selling price=$36.
What percentage is the price marked up?
Percentage marked up = $(50-40)/$40 x 100% = 25%

2. (P.92)
how can we estimate the total number of residents of a building?Write down
the method.
No. of residents
= (Average no. of residents in an apartment) x (No. of apartments in the building)

3.
Is it possible to find out the exact number of students in all the primary and
secondary schools in HK?Explain it briefly.
Yes. Just sum the the no. of students enrolled in each school.

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