COUNTIFS on the same column twice: at least this, at most that.
Deliveries promised "in 3 to 5 days" were on time if they took from 3 to 5 days inclusive. In B10 count how many of these eight landed inside that window.
Solve it on your own to keep the bonus. Each hint gets one step closer to the formula.
The same formula in the other shapes it takes at work.
This is the grid you start with. Cell references in the task — B6, C2 — point at the row numbers and column letters below.
| A | B | |
|---|---|---|
| 1 | Delivery | Days |
| 2 | D-01 | 2 |
| 3 | D-02 | 3 |
| 4 | D-03 | 6 |
| 5 | D-04 | 5 |
| 6 | D-05 | 4 |
| 7 | D-06 | 7 |
| 8 | D-07 | 3 |
| 9 | D-08 | 1 |
| 10 | Inside 3–5 days |
"Between" is two conditions joined by AND, and COUNTIFS is COUNTIF with AND built in. Repeating the range is not a mistake — it is how you put two limits on one column. Both ends are inclusive here, so 3 and 5 count.