If each lavatory serves 150 occupants, how many should be provided for 312 females?

To determine the number of lavatories required for 312 females, it's important to consider the ratio of occupants served per lavatory. In this case, one lavatory can accommodate 150 occupants.

To find out how many lavatories are necessary, the total number of females (312) is divided by the number of occupants each lavatory can serve (150):

312 ÷ 150 = 2.08

Since partial lavatories cannot be provided, we round up to the nearest whole number. This means that 3 lavatories are needed to adequately serve the 312 females, ensuring that there is sufficient access without creating a bottleneck situation. This requirement stems from building codes and guidelines aimed at maintaining adequate sanitation facilities for larger groups to ensure comfort and hygiene.

Therefore, it is necessary to provide 3 lavatories for the given number of occupants.