50. Anna will save $5 in Week 1, $6 in Week 2, and $7 in Week 3, saving $1 more each subsequent week until she saves $20 in Week 16. She will then start over, saving $5 in Week 17, then $6 in Week 18, saving $1 more each subsequent week, until she saves $20 in Week 32. This pattern will continue for all 52 weeks of the year. What is the total amount of money Anna will save in 1 full year?

Answer and Explanation

Your Answer is

Correct Answer is K

Explanation

There are 3 complete 16-week cycles from 1 to 48 weeks. According to the arithmetic sequence summation formula, the total number of 48 weeks is (5+20)*16/2*3=600; 48~52 total 4 weeks, the total It is 5+6+7+8=26, so the total for 52 weeks is 600+26=626, choose K