

Sampling problem
Name: ryan j goes
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Question:
I have a math problem in school. It says: There are 70 markers in
a bag. 30% are brown, 20% are red, 20% are yellow, 10% are orange,
10% are green and another 10% is an odd color. How many brown,
red, yellow, orange, green and the odd color are there. Can you help
me? Thanks
Replies:
Maybe you don't quite understand the meaning of '%'? Example:
the 10% which are orange  you'll need to calculate how much
10% of 70 is.
'%' is simply a short notation for 'parts of 100'. 1% is 1 for
each 100, etc. Another way to say this is: 1% = 1/100. In the
example 10% = 10/100  this is an instruction to you: 'first
multiply with 10, then divide with 100'. In this way 10% of 70
becomes: 70 multiplied with 10  gives 700. 700 divided with
100  it gives 7. Hope it helps :)
jan p anderson
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Update: June 2012

