0
Q:

Consider the following frequency distribution:

x     f

8     6

5     4

6     5

10    8

9     9

4     6

7     4

What is the median for the distribution?

A) 6 B) 7
C) 8 D) 9

Answer:   C) 8



Explanation:
Summation of frequencies = 6+4+5+8+9+6+4 = 42
Median = mid value = average of 21st and 22nd value
Arranging data in increasing order we get

x     f

4     6

5     4

6     5

7     4

8     6

9     9

10    8

 
So mid value i.e 21st and 22nd value = 8
Subject: Average
Exam Prep: Bank Exams
Q:

In the first 39 overs of a cricket match, the run rate was 4.6 runs/over. Calculate the required run rate in the remaining 11 overs to reach the target of 252 runs?

A) 7.2 B) 5.7
C) 6.3 D) 6.6
 
Answer & Explanation Answer: D) 6.6

Explanation:
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Exam Prep: AIEEE , Bank Exams , CAT

1 1815
Q:

In a class there were 28 boys and some girls. In a test the mean score obtained by the boys was 12.5 while that obtained by the girls was 14.5. If the overall average was 13.1, what was the total number of students in the class?

A) 42 B) 44
C) 40 D) 38
 
Answer & Explanation Answer: C) 40

Explanation:
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Exam Prep: Bank Exams

1 1559
Q:

What is the average of first 7 multiples of 7?

A) 7 B) 14
C) 28 D) 21
 
Answer & Explanation Answer: C) 28

Explanation:
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Exam Prep: Bank Exams

6 2055
Q:

The average age of 80 boys in a class is 15 years. The average age of a group of 15 boys in the class is 16 years and the average age of another 25 boys in the class is 14 years. What is the average age of the remaining boys in the class?

A) 15.25 years B) 14 years
C) 14.75 years D) Cannot be determined
 
Answer & Explanation Answer: A) 15.25 years

Explanation:

Total sum of age of 80 students of the class = 15 X 80 = 1200 years
15 students → 15 X 16 = 240 years
25 students → 25 X 14 = 350 years
Sum of 40 students = 590 years
Total age of remaining 40 students = 1200 – 590 = 610
So, average age = 15.25 years

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Exam Prep: Bank Exams

0 1190
Q:

The sum of a non-zero number and ten times its reciprocal is 7. Find the number.

A) 4 B) 3
C) 5 D) 6
 
Answer & Explanation Answer: C) 5

Explanation:
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Exam Prep: Bank Exams

0 1036
Q:

In a class of 65 students there are 39 girls. The average weight of these girls is 60 Kg and average weight of the full class is 64 kgs. What is the average weight of the boys of the class?

A) 69 B) 66
C) 68 D) 70
 
Answer & Explanation Answer: D) 70

Explanation:
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Exam Prep: Bank Exams

0 1344
Q:

The value of (2+32-3-342) is 

A) 36 B) 336
C) 49 D) 49+3
 
Answer & Explanation Answer: C) 49

Explanation:
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0 1092
Q:

If a+1a=2 then the vealue of a5+1a5 will be

A) 0 B) 1
C) 3 D) 2
 
Answer & Explanation Answer: B) 1

Explanation:
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1 1048