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.

Shohan

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2025-01-04 04:42

1 Answers

Shohan

$L e t, T o t a l m e m b e r i s 10 N o w, a c c o r d i n g t o t h e q u e s t i o n 10 x - 30 % o f 10 x = 12 + 30 \Rightarrow 10 x - 3 x = 12 + 30 \Rightarrow 7 x = 42 ∴ x = 6 T o t a l m b e m b e r s = 10 x = 10 \times 6 = 60 .$

5 views Answered 2024-12-14 13:31

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