Question

В новом доме 4/15 всех квартир составляют двухкомнатные, 8/15 всех квартир- однокомнатные, остальные трехкомнатные, Какую часть квартир в этом доме составляют трехкомнатные. Пожалуйста с пояснениями

Answer 1

1    4/15+8/15=12\15(квартир)-однокомнатные и двухкомнатные
2    15/15-12/15=3/15(квартир)-трёхкомнатные.
Ответ: 3/15 квартир в этом доме составляют трёхкомнатные.

Answer 2

Calculating the Proportion of Three-Room Apartments in the New Building

To calculate the proportion of three-room apartments in the new building, we can use the information provided about the distribution of different types of apartments.

Given: - Two-room apartments: 4/15 of all apartments - One-room apartments: 8/15 of all apartments - The rest are three-room apartments

Calculation

To find the proportion of three-room apartments, we can subtract the combined proportion of two-room and one-room apartments from 1 (since all apartments together make up the whole).

Proportion of three-room apartments = 1 - (Proportion of two-room apartments + Proportion of one-room apartments)

Proportion of three-room apartments = 1 - (4/15 + 8/15)

Proportion of three-room apartments = 1 - (12/15)

Proportion of three-room apartments = 1 - 0.8

Proportion of three-room apartments = 0.2

Answer

Therefore, the proportion of three-room apartments in this new building is 20%.

This calculation is based on the provided information about the distribution of different types of apartments in the new building