Question

Q 38. The male population in a city decreases by 35% per month. At the beginning of a month, there are 50,000 males in the city. After how
many months will the number of males in that city drop below 21,100?
Ops: A. О 1 month
B. O2 months
c
O 3 months
D. 4 months​

Answer 1

Answer:

I think the correct answer is b). 2 months .

If you are satisfied so please mark as brainliest to let me know if my answer was correct ..

Answer 2

CONCEPT

Logical reasoning

Percentages

GIVEN

35% of male population decreases per month.

FIND

How many months will it take so population of males drop below 21,100.

SOLUTION

• Rate of change of male population is -35%xp ( negative because population decreases).

• At the beginning there are 50,000 males in the city. i.e.  population (p) = 50,000.

• After a month the number of males left can be determined by subtracting 35% of p from the total p. i.e. 50,000-17500=32500.

• After 2nd month 35% males decrease from remaining population of previous month i.e. 32500 hence , new population will be 32500-11375=21125.

• Clearly after 2nd month the population of males will drop below 21,100.

After Two months the number of males in that city will drop below 21,100.

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