17
Q:

A motorist travels to a place 150 km away at an average speed of 50 km/hr and returns at 30 km/hr.  His average speed for the whole journey in km/hr is :

 A) 35 B) 36 C) 37.5 D) 38.2

Explanation:

Average speed = (2xy) /(x + y) km/hr

= (2 * 50 * 30) / (50 + 30) km/hr.

37.5 km/hr.

Subject: Average
Q:

The standard deviation of the set {10, 10, 10, 10, 10} is

 A) 0 B) 1 C) 5 D) 10

Explanation:

Filed Under: Average
Exam Prep: Bank Exams

2 483
Q:

If the average of 31, x, 42, 39, 56, 78, 83 and 91 is 58.5, then what is the value of x?

 A) 26 B) 34 C) 58 D) 48

Explanation:

Filed Under: Average
Exam Prep: Bank Exams

2 3892
Q:

The mode and median of the data 8, 6, 8, 7, 8, 6, 8, 7, 6 is

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

Explanation:

Filed Under: Average
Exam Prep: Bank Exams

1 576
Q:

The mean of the data 1, 2, 10, 18, 3, 17, 19 is

 A) 7 B) 10 C) 17 D) 70

Explanation:

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Exam Prep: Bank Exams

1 413
Q:

If the average age of 20 students in Class-I is 10 years and average age of 25 students in Class II is 12 years, find the average age (in years) of all students.

 A) 11 B) 11.111 C) 10.50 D) 10.85

Explanation:

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Exam Prep: Bank Exams

0 651
Q:

20 pens and 46 pencils were purchased for Rs. 235. If the average price of a pencil is Rs. 2.50 then calculate the average price (in Rs.) of a pen.

 A) 6 B) 4 C) 8 D) 12

Explanation:

Filed Under: Average
Exam Prep: Bank Exams

2 532
Q:

The average of two numbers is 10 and the product of two numbers is 96. Find the two numbers.

 A) 3, 32 B) 12, 8 C) 1, 96 D) 24, 4

Explanation:

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Exam Prep: Bank Exams

0 3343
Q:

Average of the runs of 133 players of a team is 38. If the average of the runs of the male players is 43 and the average of the runs of the female players is 24, then what will be the ratio of the total runs of male players and the total runs of female players respectively?

 A) 301 : 60 B) 7 : 3 C) 39 : 11 D) 60 : 207

Explanation:

Filed Under: Average
Exam Prep: Bank Exams

5 543