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Method of solving:

Start off with the Green cassettes. Timewise, how many minutes will 16 of them be? 16x55=880 minutes.

How many minutes of music do you have? Only 830. The difference is 50.

What are the difference between Green and Blue cassettes? 55-45=10

How many times is 10 in 50? 50/10=5

Solution:

Niko have got 5 blue and the rest (11) green.

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15y ago

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