Reasoning :: Cubes,Venn Diagram And Puzzles :: Venn Diagram

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A survey is conducted among 125 people of india.Among them 25 people have neither a valid visa nor a valid passport and 70 people have a valid visa.

Answer:

Explanation:

Let us assume that the people who have only valid passport=x

From the diagram,

people with a valid visa+people with only a valid passport+none=125

$\Rightarrow 70+x+25=125$

$\Rightarrow x=30$

In a survey conducted among 100 families, it is known that 77 families use LPG and 65 families use coal for cooking.

If each of the families uses at least one between LPG and  coal, how many families use both of them?

Answer:

Explanation:

The fact each of the families uses at least one implies that none equals zero.

From diagram we get

(77-x)+x+(65-x)=100

$\Rightarrow 142-x=100$

$\Rightarrow x=42$

B represents the number of people who use a bike.

S represents the number of people who use a bicycle.

C represents the number of people who use a car.

Answer:

Explanation:

People using exactly one among bike, bicycle and car=a+b+c

=121+57+79

=257

X  represents the number of students in a class who cleared quantitative aptitude section.

Y represent the number of students in a class who cleared the verbal section.

Z represents the number students in a class who cleared the reasoning section.

Answer:

Explanation:

From the venn Diagram we get,

exactly one+2(exactly two)+3(exactly three)=124+119+142=385--------(1)

exactly one+3(exactly three )$ = (75+64+91)+3\times 10=261$--------(2)

Subtracting(2) from (1) we get,

$\therefore$ 2(exactly two)$=124$

$\therefore$ exactly two$=62$

$\therefore$ number of students =exactly one+exactly two+exactly three+none

=(75+64+92) +62+10+2=305

Which of the following represents the students who are selected for Satyam computers and CTS but for TCS?

Answer:

Explanation:

j+k represents the students who are selected in Satyam Computers and CTS but not for TCS.

• Cubes,Venn Diagram And Puzzles - Cubes
• Cubes,Venn Diagram And Puzzles - Venn Diagram
• Cubes,Venn Diagram And Puzzles - Puzzles