Final answer:
To determine how many pizzas to order for 15 guests, multiply the number of guests by the average number of slices each will eat, then divide by the number of slices per pizza, rounding up to the nearest whole number. Typically, 5 pizzas would be sufficient for 15 guests if each guest eats an average of 2 slices and each pizza has 8 slices.
Step-by-step explanation:
The question about how many pizzas to order for a party with 15 guests is a typical problem in mathematics, specifically involving division and estimation within the realm of practical arithmetic applications. To provide an accurate answer, one would need to know the average number of pizza slices each person will consume. If, for example, a pizza is typically divided into 8 slices and each person is expected to eat 2 slices, you would calculate the total number of slices needed by multiplying the number of guests by the average slices each: 15 guests times 2 slices each equals 30 slices needed. Dividing this total by the number of slices per pizza (30 divided by 8) gives you 3.75, which means you'd need to round up since you cannot order a fraction of a pizza, resulting in a total of 4 pizzas. However, since this number might not provide extra for those who might want more than the average, you might consider ordering 5 pizzas to ensure there is plenty for everyone. It is always better to have a little more than running out, especially in the context of a party.