# TCS Aptitude Questions

1) In the class of 40 students, 30 speak Hindi and 20 speak English. What is the lowest possible number of students who speak both the languages?
(a) 5 (b) 20 (c) 15 (d) 10 (e) 30

2) If A, B and C are the mechanisms used separately to reduce the wastage of fuel by 30%, 20% and 10%. What will be the fuel economy if they were used combined.

3) A can do a piece of work in 20 days, which B can do in 12 days. In 9 days B does � of the work. How many days will A take to finish the remaining work?

4) If 20 men take 15 days to complete a job, in how many days can 25 men finish that work?

5) One fast typist type some matter in 2hr and another slow typist type the same matter in 3hr. if both do combine in how much time they will finish.

6) The ratio of incomes of C and D is 3:4.the ratio of their expenditures is 4:5.Find the ratio of their savings if the savings of C is one fourths of his income?
This question is related to TCS Interview

### Editorial / Best Answer

koteeswarrao Profile Answers by koteeswarrao Questions by koteeswarrao

• Member Since Mar-2010 | Mar 2nd, 2010

The formula is p(a union b)=p(a)+p(b)-p(a intersect b)
so, according to our problem p(a union b )=40  p(a)=30;  p(b)=20;
so, we have to find p(a intersect b), so=30+20-40 =10

Showing Answers 1 - 17 of 17 Answers

#### manoj.s.r Profile Answers by manoj.s.r

• Jan 24th, 2010

Answer is 10
Let a denote hindi speakers and b denote english speakers
p(a) is 30 p(b) is 20
by formula p(a n b)=p(a)+p(b)-p(a n b)
We get 10 as answer

#### koteeswarrao Profile Answers by koteeswarrao

• Mar 2nd, 2010

The formula is p(a union b)=p(a)+p(b)-p(a intersect b)
so, according to our problem p(a union b )=40  p(a)=30;  p(b)=20;
so, we have to find p(a intersect b), so=30+20-40 =10

#### Madhuraramaraj Profile Answers by Madhuraramaraj

• Jul 6th, 2010

1. 10
2. 30%
3. 5
4. 19 days(approximately)
5. 2 and half hours
6. 1 fourth

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#### sudhanthiraraj Profile Answers by sudhanthiraraj

• Aug 20th, 2010

d) 10

#### saurav28 Profile Answers by saurav28

• Aug 21st, 2010

Here n(AUB)=40
n(A)=30
n(B)=20

we know
n(AUB)=n(A)+n(B)-n(A INTERSECTION B)
=>40=30+20-n(A INTERSECTION B)
=>n(A INTERSECTION B)=10
so 10 speak both the language

#### tamaldutta000001 Profile Answers by tamaldutta000001

• Aug 25th, 2010

Ans of Q No.-6
Given Ci/Di=3/4 Ce/De=4/5
Let income of C & D be 3x & 4x
respectively
and expenditure 4t & 5t respectively
Now the given that 4t-3x=3x/4 =>t=15x/16
Now we have to calculate (4t-3x)/(5t-4x){the savings ratio}
Now putting the value of t we will get 12:11.
Please response to this answer

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#### AnbuSoft Profile Answers by AnbuSoft

• Aug 27th, 2010

1) 10
2) 50%
3) 5 days
4) 12 days
5) 50 min
6) 3:4

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#### vimalathithan2007 Profile Answers by vimalathithan2007

• Sep 7th, 2010

5) Fast and slow typist combined together means 100/2 + 100/3 =500/6
They have to complete the 100% work.
so (500/6)*X=100
Then x=1.2 hr(72 min)

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#### whatdoumeanwhtsup Profile Answers by whatdoumeanwhtsup

• Sep 13th, 2010

Minimum number of persons speaking both hindi and english 10

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#### kirthe shree Profile Answers by kirthe shree

• Sep 14th, 2010

1) x= a intersection b part
(30-x) + (20-x)=40
2x=10
therefore x=5

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#### rajamanikandan1987 Profile Answers by rajamanikandan1987

• Sep 16th, 2010

Formula is p(a n b) = p(a) + p(b) - p(a u b)
where,
p(a) = 30, who speaks hindi
p(b) = 20, who speaks english
p(a u b) = 40, total students
p(a n b) = ?
=> 30 + 20 - 40
=> 10
Solution is 10.

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#### IshanAcharya Profile Answers by IshanAcharya

• Sep 30th, 2010

1. 10
2. ..
3. 5 days
4. 12 days
5. 1.2 Hrs
6. 1:1

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#### Venugopal668 Profile Answers by Venugopal668

• Nov 7th, 2010

2. 1/20+1/30+1/10=11/60
1/5.5
so efficiency 100-5.5
94.5%

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#### sarabjit Profile Answers by sarabjit

• Nov 8th, 2010

n(AUB) = 40
n(A)  =  30
n(B) =   20
n(A^B) = 50-40
ans =10

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#### prititripathi Profile Answers by prititripathi

• Dec 20th, 2010

use union formula

so 40=20+30-both
both=10
ans is 10

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#### prititripathi Profile Answers by prititripathi

• Dec 20th, 2010

20 men completes worh in 1/15 days

1 men in =1/15*20
25 men in
=25/20*15
25 men completes in 12 days

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#### megsn Profile Answers by megsn

• Jan 12th, 2011

b,5.4%,5 days,12 days,1.2hrs,12:19

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