Blue and red flags are in the ratio 3:5. The fraction of all flags that are blue is 3/d. Enter the denominator d.
Правильный ответ
8
Объяснение
The whole has 3 plus 5 equal parts, so the blue share is 3/8 and d is 8. Using 5 as the denominator would compare blue flags with red flags rather than with all flags.