Resources

Frage

At a chess tournament there are 46 participants. The ratio of the participants that speak Spanish and English is 3:2 and 6 speak neither of these languages. If the number of participants that speak both Spanish and English is 5, how many participants speak only Spanish?

Lösung

Ratios and Overlapping Sets – Deutsch

Ratios and Overlapping Sets – English

Frage

Is |x| < 1 ?
(1) |x + 1| = 2|x – 1|
(2) |x – 3| > 0

Lösung

Frage

In a consumer survey, 85% of those surveyed liked at least one of three products: 1, 2, and 3. 50% of those asked liked product 1, 30% liked product 2, and 20% liked product 3. If 5% of the people in the survey liked all three of the products, what percentage of the survey participants liked more than one of the three products?

Lösung