56
Q:

# The average temperature of the town in the first four days of a month was 58 degrees. The average for the second, third, fourth and fifth days was 60 degrees. If the temperatures of the first and fifth days were in the ratio 7 : 8, then what is the temperature on the fifth day ?

 A) 62 degrees B) 64 degrees C) 65 degrees D) 66 degrees

Answer:   B) 64 degrees

Explanation:

Sum of temperatures on 1st, 2nd, 3rd and 4th days = (58 * 4) = 232 degrees ... (1)

Sum of temperatures on 2nd, 3rd, 4th and 5th days - (60 * 4) = 240 degrees  ....(2)

Subtracting (1) From (2), we get :

Temp, on 5th day  - Temp on 1st day  = 8 degrees.

Let the temperatures on 1st and 5th days be 7x and 8x degrees respectively.

Then, 8x - 7x = 8 or x = 8.

Temperature on the 5th day = 8x = 64 degrees.

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

6 897
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 8258
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

Answer & Explanation Answer: C) 8 and 7

Explanation:

Filed Under: Average
Exam Prep: Bank Exams

4 875
Q:

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

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

Explanation:

Filed Under: Average
Exam Prep: Bank Exams

1 567
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:

Filed Under: Average
Exam Prep: Bank Exams

1 1018
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

2 754
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

Answer & Explanation Answer: B) 12, 8

Explanation:

Filed Under: Average
Exam Prep: Bank Exams

0 6871
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

Answer & Explanation Answer: A) 301 : 60

Explanation: