6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

In a single throw with 2 dices, what is probability of neither getting an even number on one and nor a multiple of 3 on other?

A) 11/36	B) 25/36
C) 5/6	D) 1/6

Answer & Explanation Answer: B) 25/36

Explanation:

We first calculate the probability of getting an even number on one and a multiple of 3 on other,Here, n(s) = 6x6 = 36 and

E = (2,3) (2,6) (4,3) (4,6) (6,3) (6,6) (3,2) (3,4)(3,6) (6,2)(6,4)

n(E) = 11P(E) = 11/36Required probability = 1-11/36 = 25/36

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Filed Under: Probability
Exam Prep: Bank Exams
Job Role: Bank PO , Bank Clerk

17 3247

Q:

48 people could complete a task in 17 days. After 6 days, 4 of the workers left. How many days from then will it take to complete the task?

A) 12	B) 13
C) 15	D) 16

Answer & Explanation Answer: A) 12

Explanation:

Given, 48 people can do a work in 17 days. So total work = 48 x 17 = 816
Work done by 48 people in 6 days = 288.

The remaining work = 816 - 288 = 528
After 6 days four workers left. So number of people working is 44
Total number of days required for 44 men to complete the remaining work = 528/44 = 12

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Filed Under: Time and Work
Exam Prep: AIEEE , Bank Exams , CAT

1 3244

Q:

21% of 500 + 31% of 1100 - 30% of 790 = ?

A) 209	B) 290
C) 309	D) 390

Answer & Explanation Answer: A) 209

Explanation:

Given 21% of 500 + 31% of 1100 - 30% of 790 = ?

? = 21 x 5 + 31 x 11 - 3 x 79

? = 105 + 341 - 237

? = 446 - 237

? = 209.

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Filed Under: Percentage
Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Analyst , Bank Clerk , Bank PO

4 3243

Q:

Three cars A, B and C started from a point at 5 pm, 6 pm and 7 pm respectively and travelled at uniform speeds of 60 km/hr, 80 km/hr and x km/hr respectively in the same direction. If all the three met at another point at the same instant during their journey, then what is the value of x?

A) 120	B) 110
C) 105	D) 100

Answer & Explanation Answer: A) 120

Explanation:

Distance covered by A till 6pm = 60 km

Distance covered by A till 7 pm = 120 km

Time taken by B to catch A = 60/(80-60 ) = 3 hrs

So A and B will meet at 6pm + 3 hrs = 9pm

Since we know that all three met at the same time

The time taken by C to cover 120 km

difference will be = 9pm –7pm = 2hrs

Therefore,(x –60 )*2 = 120x = 120 km/hr

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Filed Under: Time and Distance
Exam Prep: Bank Exams

0 3224

Q:

A, B and C invested amounts in the ratio 3 : 4 : 5 respectively. If the schemes offered compound interest at the rate of 20% per annum, 15% per annum and 10% per annum respectively, then what will be the ratio of their amounts after 1 year?

A) 3 : 15 : 25	B) 6 : 6 : 5
C) 36 : 46 : 55	D) 12 : 23 : 11

Answer & Explanation Answer: C) 36 : 46 : 55

Explanation:

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Filed Under: Partnership
Exam Prep: Bank Exams

1 3223

Q:

Simple Interest received by a person in 10 years on a principal of Rs 9500 is 130% of the principal. What is the rate of interest (in %) per annum?

A) 12	B) 13
C) 15	D) 19

Answer & Explanation Answer: B) 13

Explanation:

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Filed Under: Simple Interest
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5 3219

Q:

Find the standard deviation of {11, 7, 10,13, 9}

A) 1	B) 2
C) 4	D) 5

Answer & Explanation Answer: B) 2

Explanation:

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Filed Under: Probability
Exam Prep: Bank Exams

12 3219

Q:

What is the average of first 11 multiples of 11?

A) 22	B) 44
C) 55	D) 66

Quantitative Aptitude - Arithmetic Ability Questions

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