Answer:
K=20
Step-by-step explanation:
The question appears to lack any elements of randomness.
An arrival rate of one per minute is constant.
Next, calculate the average expense incurred by each individual to attain a four, which includes the cost of the guide alongside the expense of waiting.
This leads us to K, representing the anticipated number of attendees.
Calculating the waiting time per minute gives
= 1/2(K-1)K.
The tour expense amounts to 20+1/20(K-1).
The cost attributed to each guest equals 20/k +1/20(K-1).
By setting the derivative to zero, we find that
K=20