Question
The average number of pages Irene read in a certain number of days was 13. In the next three days, Irene read another 87 pages. As a result, the average number of pages she read increased to 15. How many days did Irene read in total?
3 m

Click button first when a symbol is required. X

The average number of pages Irene read in a certain number of days was 13. In the next three days, Irene read another 87 pages. As a result, the average number of pages she read increased to 15. How many days did Irene read in total?