Final answer:
Irfan should order 230 Ristretto capsules for his coffee shop based on the proportion from a customer survey and the total order of 500 capsules.
Step-by-step explanation:
To determine how many Ristretto capsules Irfan should order out of the 500 capsules based on the survey, we need to use proportional allocation. The survey shows that out of 50 customers, 23 prefer Ristretto. Therefore, the proportion of Ristretto lovers is 23/50. We apply this proportion to the total order:
Total Ristretto capsules = (23/50) × 500
After performing the calculation, we find that Irfan should order:
230 Ristretto capsules