IPA FE Subject A 2026 Question 17
A question IPA Japan published in 令和８年度 基本情報技術者試験 科目A 公開問題 問17, translated into English. ITPEC is based on the same exams.
Among services A through D, which of the following has the highest member retention rate?
Here, the members subject to retention are those who remained enrolled continuously from the end of the previous month to the end of the current month, and the members who newly joined in the current month do not cancel their membership by the end of the month.
Unit: persons
Explanation
Service B — count the members kept from last month, leaving out this month's new members, and divide by last month's total.
New members do not leave by the end of the month, so members retained = members at end of current month − new members in current month. Retention rate = members retained ÷ members at end of previous month.
Service B keeps the largest share of the members it had.
Answer (b)
Why not others:
- •(a) — 500 of the 800 at month-end are new; only 300 of the 1,000 existing members stayed, 30%
- •(c) — 600 of 1,500 existing members stayed, 40%
- •(d) — the most members at month-end and the most new ones, but only 800 of 1,500 existing members stayed, about 53.3%; growth in total members is not retention
Key rule: Retention counts only the members who were there at the start: take out the new joiners before dividing by the opening count.
Business Strategy Management · AI-written, may contain errors
This question comes from the past questions IPA Japan publishes, translated into English by ITPEC Practice. ITPEC Practice is an independent study tool and is not affiliated with IPA or ITPEC. See the original paper (PDF) or Report an issue.