Using proportions, it is found that 7% of the population has blue eyes without blonde hair.
10% of the population has blue eyes. These 10% are composed by:
- 75% of 4%(have blonde hair).
- x% of 96%(do not have blonde hair)
Hence, the relation according to the proportion of 10% is:
Out of the entire population:
0.0729(0.96) = 0.07
7% of the population has blue eyes without blonde hair.
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