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After conducting a survey of 400 adults, it was found that 15% of them did not know how to swim. How many adults did not know how to swim?

Sagot :

We remember that [tex]1\% =\dfrac1{100}[/tex]

So 15% of 400 is:

[tex]\dfrac{15}{100}\cdot400=15\cdot4=60[/tex]

60 adults didn't know how to swim.

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