Предмет: Математика, автор: МоРе99

ПОМОГИТЕ РЕШИТЕ ЗАДАЧУ

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Ответы

Автор ответа: ОльгаКнязева
1

Пусть в 1 туре учавствовало x участников. Тогда во 2 туре - 0,75x, а в 3 туре - 0,225x. Разница между 2 и 3 туром - 21 участник, то есть

0,75x-0,225x=21

0,525x=21

X=40. Это количество участников в 1 туре.

Ответ: 40 участников.

МоРе99: Спасибо большое, выручили!
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