The average of 5 consecutive numbers is n. if the next two number are also included. The average will?

- ARemain the same
- BIncrease by 1
- CIncrease by 2
- DDecrease by 1

The average weight of a class of 20 boys was calculated to be 58.4 kgs and it was later found that one weight was misread as 56 kg instead of 65 kg. What is the correct weight

- A67.4 kg
- B57.75 kg
- C58.85 kg
- D49.4 kg
**Explanation:**Total weight is (20×58.4-56+65) = 1177 kgs

Average weights is 1177/20 = 58.85kgs

Average of 13 results is 65. If the average of first six results is 61 and average of last six results is 59 Then find the seventh result

- A115
- B135
- C125
- D105
**Explanation:**Total of 13×65 = 845

Total number of first six numbers = 61×6=366

Total number of last six numbers= 59×6=354366+354 = 720

845-720 = 125

Average of five consecutive even numbers is 35. Find the greatest number in these five numbers

- A31
- B33
- C39
- D36
**Explanation:**Greatest number in these five numbers = 39

The average of seven numbers is 18. The average of first three numbers is 14 and the average of last three numbers is 19. What is the middle number

- A42
- B57
- C27
- DNone of these
**Explanation:**Total of seven numbers = 7×18 =126

Average of first three numbers = 14×3 = 42

Average of last three numbers = 19×3 =57

=42+57 = 99

Middle number is = 126-99 = 27

The average age of a class of 32 students is 16 yrs. If the teacher's age is also included, the average increases by one year. Find the age of the teacher.

- A49
- B48
- C47
- D50
**Explanation:**Students total age = 32×16 = 512 years

include teacher's age = 33 × (16+1) = 561

561-512 = 49 Yrs

In a class, the average age of 30 boys is 13 years and the average of 20 girls is 12 years. What is the average age of the whole class

- A12.5 yrs
- B14.2 yrs
- C12.3 yrs
- D12.6 yrs
**Explanation:**Total age of 50 students

(30×13+20×12) = 630

Average = 630/50 = 12.6 yrs

What is the average of first 21 multiples of 7

- A49
- B77
- C66
- D57
**Explanation:**Average = 7×(1+2+....+21)/21

(7/21)×((21×22)/2)

=77

- The Average age of the members of a 4-mambers family is 15-years .Twenty Yreasa from tha average age would be
- A20 years
- B60 Years
- C35 Years
- D30 Years

- The mean of the following data 8, 10, 9, 6 and 4 is
- A7.2
- B7.4
- C8.2
- D7.0

- Rate of a bike is 17000 the Company gave 1700 discount to the bike,then what is the percentage of the discount?
- A15 PERC
- B25 PERC
- C5 PERC
- D10 PERC

- The mean of the first n natural number
- AN(n+/ 2
- BN(n+(2n+/ 2
- CN+1 / 2
- DN²

- Study the following bar-graph and answe the question given below

A Company in certain period of fertilizer production (10000 tonnes)

The average production of 1996 and 1997 was exactly equal to the average production of which of the following pairs of years - A
- B2000 and 2001
- C1999 and 2000
- D1995 and 1999
- E1995 and 2001

- The average monthly income of P and Q is RS 5050. The average monthely income of Q and R is RS 6250 and the average monthly income of P and R is RS 5200 The monthly income of P is
- ARS 3500
- BRS 4000
- CRS 4050
- DRS 5000

- The diagonal of a rectangle is ?41 cm and its area is 20 sq.cm. The perimeter of the rectangle must be
- A9 cm
- B18 cm
- C20 cm
- D41 cm

- The Average age of the members of a 4-mambers family is 15-years .Twenty Yreasa from tha average age would be
- A20 years
- B60 Years
- C35 Years
- D30 Years

- The mean of the following data 8, 10, 9, 6 and 4 is
- A7.2
- B7.4
- C8.2
- D7.0

- Rate of a bike is 17000 the Company gave 1700 discount to the bike,then what is the percentage of the discount?
- A15 PERC
- B25 PERC
- C5 PERC
- D10 PERC

- The mean of the first n natural number
- AN(n+/ 2
- BN(n+(2n+/ 2
- CN+1 / 2
- DN²

- Study the following bar-graph and answe the question given below

A Company in certain period of fertilizer production (10000 tonnes)

The average production of 1996 and 1997 was exactly equal to the average production of which of the following pairs of years - A
- B2000 and 2001
- C1999 and 2000
- D1995 and 1999
- E1995 and 2001

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