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In a certain country, a person is born every 4 second and person dies every 10 seconds . Therefore , the birth and death rates account for a population growth rate of one person every--

In a certain country, a person is born every 4 second and person dies every 10 seconds . Therefore , the birth and death rates account for a population growth rate of one person every-- Correct Answer 6.67 seconds

LCM of 4 & 10 is 40. 10 persons are born in every 40 seconds. 4 persons die every 40 second. Population growth rate = 6 persons every 40 seconds = 1 person every (40/6 = 6.67) seconds

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The question is given below consist of a question followed by three statements labeled as I, II and III. You have to decide whether these statements give enough information required to answer the question or not. Ten people P, Q, R, S, T, U, V, W, X and Y were born on ten different dates 5, 7, 9, 12, 13, 15, 18, 21, 23 and 27 of the same month but not necessarily in the same order. I. Q and T were born on an even numbered date. W was born on 7 and U was born after W. Only five people were born between R and T. Y was born on 23. P is the eldest person. II. V was born on 13 and T on 12. Neither S nor Q was born on 27. Only six people were born between P and X. and P is the eldest person. There are as many people between T and Q as between Q and R. III. P is the eldest and R is the youngest person. Only six people were born between W and Y. If the dates on which T and S were born are added, the resultant will give the date on which X was born. When was X born?
In a certain country, a person born in every 7seconds and a person dies every 13 seconds. Therefore the birth and death rates account for a population growth rate of one person?
The line chart given below shows the birth rate (per thousand persons) and death rate (per thousand persons) of countries P, Q, R and S in the year 2018. Which of the following statement(s) is/are correct? I. Birth rate of country Q is 9.2 percent more than country R. II. Birth rate of country R is 11.76 percent more than the birthrate of country S. III. Birth rate of country Q is 32 percent more than the birth rate of country S.
S1: Different countries show different pattern of growth.
P: Many others have a high birth rate with a low death rate.
Q: Some have a high birth rate and still have a high death rate.
R: The developing countries show the most rapid growth rate.
S: Some others like the European nations, have a low birth rate and a low death rate.
S6: Compared to this in Europe the growth rate is low.

The Proper sequence should be:
Which of the following statements are correct related to population studies? (A) The Neo-Malthusian theories, contended that in the human population fertility behaviour is conditioned by technological development (B) Thomas Malthus was an English Economist and demographer (C) Population cohort refers to, a group of population unified by a specific common characteristics (D) Crude birth rate refers to birth rates minus death rates (E) Population pyramids are constructed to identify natural growth rate of population Choose the correct answer from the options given below: