A leisure centre hosts 150 people. 30% are swimming, and the rest are in the fitness class or gym. The number in the fitness class is double the number in the gym. How many people are in the fitness c

Total people hosted = 150.
Percentage swimming = $30\%$.
Number of people swimming = $0.30 \times 150 = 45$ people.

Remaining people = Total people - People swimming
Remaining people = $150 - 45 = 105$ people.

Let $F$ be the number of people in the fitness class and $G$ be the number of people in the gym.
We know $F + G = 105$.
We are given that the number of people in the fitness class is double the number in the gym, so $F = 2G$.
Substitute $F = 2G$ into the equation:

Now find $F$:

The number of people in the fitness class is $\boxed{70 \text{ people}}$.

Total people swimming = 45 (from part a).
Number of males swimming = 25.
Number of females swimming = Total swimming - Males swimming
Number of females swimming = $45 - 25 = 20$.

To make teams with the same number of males and females in each team, the coach needs to find the Greatest Common Divisor (GCD) of the number of males and the number of females.
Number of males = 25.
Number of females = 20.
Factors of 25: $1, 5, 25$.
Factors of 20: $1, 2, 4, 5, 10, 20$.
The greatest common divisor of 25 and 20 is 5.
The maximum number of teams the coach can make is $\boxed{5 \text{ teams}}$.

Number of boxes bought = 25.
Cost per box = Ugx. 24,000.
Total cost = $25 \times 24,000 = \text{Ugx. } 600,000$.

Apples per box = 30.
Total apples bought = $25 \times 30 = 750$ apples.

Apples damaged on transportation = 25.
Apples later discovered rotten = 35.
Total unsellable apples = $25 + 35 = 60$ apples.

Sellable apples = Total apples bought - Total unsellable apples
Sellable apples = $750 - 60 = 690$ apples.

Selling price per apple = Ugx. 1,000.
Total revenue = $690 \times 1,000 = \text{Ugx. } 690,000$.

Profit/Loss = Total Revenue - Total Cost
Profit/Loss = Ugx. $690,000 - \text{Ugx. } 600,000 = \text{Ugx. } 90,000$.

Aunt Sarah made a profit of $\boxed{\text{Ugx. } 90,000}$. This is because her total revenue (Ugx. 690,000) was greater than her total cost (Ugx. 600,000).