Practice MCQ Questions and Answer on Average

441.

A grocer has a sale of Rs. 6435, Rs. 6927, Rs. 6855, Rs. 7230 and Rs. 6562 for 5 consecutive months. How much sale must he have in the sixth month so that he gets an average sale of Rs. 6500?

  • (A) Rs. 4991
  • (B) Rs. 5991
  • (C) Rs. 6001
  • (D) Rs. 6991

442.

One-fourth of certain journey is covered at the rate of 25 km/h, one-third at the rate of 30 km/h and the rest at 50 km/h. Find the average speed for the whole journey.

  • (A) $$\frac{{600}}{{53}}$$ km/h
  • (B) $$\frac{{1200}}{{53}}$$ km/h
  • (C) $$\frac{{1800}}{{53}}$$ km/h
  • (D) $$\frac{{1600}}{{53}}$$ km/h

443.

Mean of 10 numbers is 30. Later on it was observed that numbers 15, 23 are wrongly taken as 51, 32. The correct mean is :

  • (A) 25.5
  • (B) 32
  • (C) 30
  • (D) 34.5

444.

A grocer has a sale of Rs. 6435, Rs. 6927, Rs. 6855, Rs. 7230 and Rs. 6562 for 5 consecutive months. How much sale must he have in the sixth month so that he gets an average sale of Rs. 6500?

  • (A) Rs. 4991
  • (B) Rs. 5991
  • (C) Rs. 6001
  • (D) Rs. 6991

445.

The average of ten numbers is 7. If each number is multiplied by 12, then the average of the new set of numbers is :

  • (A) 7
  • (B) 19
  • (C) 82
  • (D) 84

446.

The average monthly income of a family of four earning members was Rs. 15130. One of the daughters in the family got married and left home, so the average monthly income of the family came down to Rs. 14660. What is the monthly income of the married daughter?

  • (A) Rs. 12000
  • (B) Rs. 15350
  • (C) Rs. 16540
  • (D) Cannot be determined

447.

The average of 8 numbers is 20. The average of first two numbers is $$15\frac{1}{2}$$ and that of the next three is $$21\frac{1}{3}$$. If the sixth number be less than the seventh and eighth numbers by 4 and 7 respectively, then the eight number is-

  • (A) 18
  • (B) 22
  • (C) 25
  • (D) 27

448.

The average of runs of a cricket player of 10 innings was 32. How many runes must be made in his next innings so as to increase his average of runs by 4?

  • (A) 72
  • (B) 74
  • (C) 70
  • (D) 76

449.

Visitor to a show were charged Rs. 15 each on the first day, Rs. 7.50 each on the second day and Rs. 2.50 each on the third day. The attendance on the three days was in the ratio 2 : 5 : 13. The average charge per person for the whole show was-

  • (A) Rs. 5
  • (B) Rs. 6.33
  • (C) Rs. 7.50
  • (D) Rs. 9

450.

The speed of the train going from Nagpur to Allahabad is 100 km/h while when coming back from Allahabad to Nagpur, its speed is 150 km/h. find the average speed during whole journey.

  • (A) 125 km/hr
  • (B) 75 km/hr
  • (C) 135 km/hr
  • (D) 120 km/hr