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Swimming pool of students in primary and secondary students accounted for 30%, again a group of stud

Chi-chi-hu2010-01-28 07:01:27 +0000 #1
the percentage of primary school pupils?

Use-based counting method Oh!

To:

assumptions: ... ... ... ... ... ...

... ... ... ... ... ... ... ... ... ...
leegegeABC2010-01-28 07:13:18 +0000 #2
The students, grade levels, was not set up a few, ah, is of special value method Well ... ... ... ...

established: swimming pool, there are 100 students, there were 30 pupils. Came after a group of students, a total of 120 elementary school children 48. (This question should be asked again, how many primary school students in years Bar ... ...)

∵ primary school students came 48-30 = 18 for every person, has come to a total of 120-100 = 20,

∴ primary school students came again accounted for the the total number of students 18 ÷ 20 = 90%.

----- --------- Call not done a long time the title ----------- special value to tell you who started this year, Kazakhstan's sister
gxzy Week 942010-01-28 07:31:57 +0000 #3
en

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