Answer:
Solution:
Total words are 170 + 75+60+55=360.
Each week, Sofia is test with 15 words from the list.
Total number of weeks it will take to finish the test is 24.
Average number of weeks in a year is 25 approximately.
Seven weeks are already over, that means 15×7=105 words are covered from the list. Conclusion:
Remaining words are 360—105=255.
These words can be covered in a group of 15 in a week, so 25515=17 are the number of weeks.
Therefore, the number of words that Sofia will be tested on before the end of the year is 255.
Explanation: