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Recent questions tagged ch16

How has DDT caused decline in bird population?

asked Jul 12, 2017 by pady_1

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What is the main idea behind “Joint Forest Management Concept” introduced by the Government of I

asked Jul 12, 2017 by pady_1

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How can slash and burn agriculture become environment friendly?

asked Jul 12, 2017 by pady_1

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Why has National forest commission of India recommended a relatively larger forest cover for hills t

asked Jul 12, 2017 by pady_1

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What is hybrid vehicle technology? Explain its advantages with a suitable example.

asked Jul 12, 2017 by pady_1

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What are the three major kinds of impurities in domestic waste water?

asked Jul 12, 2017 by pady_1

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What do you understand by Snow-blindness?

asked Jul 12, 2017 by pady_1

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It is a common practice to plant trees and shrubs near the boundary walls of the buildings. What pur

asked Jul 12, 2017 by pady_1

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Name one green house gas and its possible source of production on a large scale. What are the harmfu

asked Jul 12, 2017 by pady_1

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Is it true that if the dissolved oxygen level drops to zero, the water will become septic. Give an e

asked Jul 12, 2017 by pady_1

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Is it true that carpets and curtain/drapes placed on the floor or wall surface can reduce the noise

asked Jul 12, 2017 by pady_1

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What is cultural eutrophication?

asked Jul 12, 2017 by pady_1

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What is the best solution for the treatment of electronic wastes?

asked Jul 12, 2017 by pady_1

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What is reforestation?

asked Jul 12, 2017 by pady_1

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What do you understand by biomagnification?

asked Jul 12, 2017 by pady_1

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What is an algal bloom?

asked Jul 12, 2017 by pady_1

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Name an industry which can cause both air and thermal pollution and as well as eutrophication.

asked Jul 12, 2017 by pady_1

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Mention any two examples of plants used as wind breakers in the agricultural fields.

asked Jul 12, 2017 by pady_1

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Blends of polyblend and bitumen, when used, help to increase road life by a factor of three. What is

asked Jul 12, 2017 by pady_1

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What is the raw material for polyblend?

asked Jul 12, 2017 by pady_1

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It is a common practice to undertake desilting of the overhead water tanks. What is the possible sou

asked Jul 12, 2017 by pady_1

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Name the city in our country where the entire public road transport runs on CNG.

asked Jul 12, 2017 by pady_1

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In which year was the Air (prevention and control of pollution) Act amended to include noise as air

asked Jul 12, 2017 by pady_1

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What is organic farming? Discuss the benefits of organic farming as a viable practice in the context

asked Jul 12, 2017 by pady_1

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How does an electrostatic precipitator work?

asked Jul 12, 2017 by pady_1

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Use of lead free petrol or diesel is recommended to reduce the pollution emitted by automobiles. Wha

asked Jul 12, 2017 by pady_1

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Match the following :

asked Jul 9, 2014 by sreemathi.v

1 answer

Match the proposed probability under Column $C_1$ with the appropriate written description under column $C_2$ :

asked Jul 9, 2014 by sreemathi.v

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The probability of happening of an event A is 0.5 and that of B is 0.3. If A and B are mutually exclusive events, then the probability of neither A nor B is ________.

asked Jul 9, 2014 by sreemathi.v

1 answer

If A and B are two events associated with a random experiment such that $P(A)=0.3,P(B)=0.2$ and $P(A \cap B)=0.1$ then the value of $P(A \cap \bar{B})$ is _________

asked Jul 9, 2014 by sreemathi.v

1 answer

Let S={1,2,3,4,5,6} and E={1,3,5},then $\bar{E}$ is_________.

asked Jul 9, 2014 by sreemathi.v

1 answer

If $e_1,e_2,e_3,e_4$ are the four elementary outcomes in a sample space and $P(e_1) = .1, P(e_2) = .5, P (e_3) = .1$, then the probability of $e_4$ is ______.

asked Jul 9, 2014 by sreemathi.v

1 answer

The probability that the home team will win an upcoming football game is 0.77, the probability that it will tie the game is 0.08, and the probability that it will lose the game is _____________

asked Jul 9, 2014 by sreemathi.v

1 answer

True-or-False : The sum of probabilities of two students getting distinction in their final examinations is 1.2

asked Jul 9, 2014 by sreemathi.v

1 answer

True-or-False : The probability of an occurrence of event A is 0.7 and that of the occurrence of event B is 0.3 and the probability of occurrence of both is 0.4.

asked Jul 9, 2014 by sreemathi.v

1 answer

True-or-False : The probability of intersections of two events A and B is always less than or equal to those favorable to the event A.

asked Jul 9, 2014 by sreemathi.v

1 answer

True-or-False : If A and B are two candidates seeking admission in an engineering college.The probability that A is selected is 0.5 and the probability that both A and B are selected is at most 0.3.Is it possible that the probability of B getting selected is 0.7?

asked Jul 9, 2014 by sreemathi.v

1 answer

True-or-False : The probabilities that a typist will make 0,1,2,3,4,5 or more mistakes in typing a report are,respectively,0.12,0.25,0.36,0.14,0.08,0.11

asked Jul 9, 2014 by sreemathi.v

1 answer

True-or-False : The probability that a student will pass his examination is 0.73,the probability of the student getting a compartment is 0.13,and the probability that the student will either pass or get compartment is 0.96.

asked Jul 9, 2014 by sreemathi.v

1 answer

True-or-False : The probability that a person visiting a zoo will see the giraffee is 0.72,the probability that he will see the bears is 0.84 and the probability that he will see both is 0.52.

asked Jul 9, 2014 by sreemathi.v

1 answer

If M and N are any two events,the probability that at least one of them occurs is

asked Jul 9, 2014 by sreemathi.v

1 answer

The probability that at least one of the events A and B occurs is 0.6.If A and B occur simultaneously with probability 0.2.Then $P(\bar{A})+P(\bar{B})$ is

asked Jul 9, 2014 by sreemathi.v

1 answer

If the probabilities for A to fail in an examination is 0.2 and that for B is 0.3.Then the probability that either A or B fails is

asked Jul 9, 2014 by sreemathi.v

1 answer

A single letter is selected at random from the word PROBABILITY .The probability that it is a vowel is

asked Jul 9, 2014 by sreemathi.v

1 answer

6 boys and 6 girls sit in a row at random.The probability that all the girls sit together is

asked Jul 9, 2014 by sreemathi.v

1 answer

If $A\cup B)=P(A \cap B)$ for any two events A and B,then

asked Jul 9, 2014 by sreemathi.v

1 answer

If A and B are mutually exclusive events,then

asked Jul 9, 2014 by sreemathi.v

1 answer

Without repetition of the numbers,four digit numbers are formed with the numbers 0,2,3,5.The probability of such a number divisible by 5 is

asked Jul 9, 2014 by sreemathi.v

1 answer

Seven persons are to be seated in a row.The probability that two particular persons sit next to each other is

asked Jul 9, 2014 by sreemathi.v

1 answer

While shuffling a pack of 52 playing cards,2 are accidently dropped.Find the probability that the missing cards to be of different colours.

asked Jul 8, 2014 by sreemathi.v

1 answer

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