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Thirty percent of the members of a swimming club have passed lifesaving test. Among the members who have not passed the test, 12 have taken the preparatory course and 30 have not.

dsuc.created: 2 years ago | dsuc.updated: 2 years ago
dsuc.updated: 2 years ago

 Let, Total member is 10Now, according to the question10x-30% of 10x=12+3010x-3x=12+307x=42 x=6 Total mbembers=10x=10×6=60.

1 year ago

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