Average Questions for SBI Clerk 2018 and Canara Bank PO with solution

Q.1 In a family there are 5 members Mahi, Anuj, Anchal, Neha and Ajay. The average age of five members is 32 years. The present age of Mahi and Anchal is respectively 4 years and 6 years. What was the average age of Anuj, Neha and Ajay at the time of the birth of Mahi?

(A) 36 years

(B) 44 years

(C) 40 years

(D) 42.5 years

(E) 50 years

 

Q.2 The average weight of 10 employees of a company is 86 kg. If the weight of the boss includes, the average increased by 1 kg and the weight of Amulya is 20 kg less than the weight of boss, find the average weight of Amulya and boss.

(A) 78 kg

(B) 50 kg

(C) 70 kg

(D) 87 kg

(E) None of these

 

Q.3 The average salary of 4 friends Aarush, Manish, Neeraj and Sajal is Rs 9100. The average salary of Aarush and Sajal is Rs 9800, Neeraj and Sajal is Rs 10400, Aarush and Manish is Rs 7800. Find the Average salary of Manish and Neeraj.

(A) Rs 9000

(B) Rs 8500

(C) Rs 8000

(D) Data Inadequate

(E) None of these

 

Q.4 In a school there are 24 students, 1 teacher and 1 principal. The age of teacher is 30 years and the age of the principal is 5 years more than the teacher. If the teacher and the principal are replaced by another two teachers the average age drops by 1 years. Find the average age of two new teacher.

(A) 19.5 years

(B) 20.2 years

(C) 25 years

(D) 15.5 years

(E) None of these

 

Q.5 In a coaching class there are four section and each section contains 50, 40, 65 and 45 students. If the % of passing students in each section is 48%, 55%, 60% and 40% respectively. Find the average of fail students in all sections.

(A) 17.25 years

(B) 15 years

(C) 25.20 years

(D) 24.25 years

(E) 20 years

 

Answer 1. (B) 44 years

Explanation:

Total age of 5 members = 32 × 5 = 160

At the time of birth of Mahior 6 years age the total age of Anuj, Neha and Ajay was

= 160 − (4 × 5) − (2 × 4) = 160 − 20 − 8

= 132

Average = 132/3  = 44 years


Answer 2. (D) 87 kg

Explanation:

Total weight = 86 × 10 = 860 kg

Let the weight of the boss = a kg.

According to the question,

 860 + a
     11      
= 87

860 + a = 957

a = 957 − 860

a = 97

Weight of Amulya = 97 − 20 = 77 years

Average =
77 + 97
      2    .
= 87 years

Answer 3.

Explanation:

Total salary of Aarush, Manish, Neeraj and Sajal = 9100 × 4 = 36400

Total salary of Aarush and Sajal = 9800 × 2 = 19600

Total salary of Neeraj and Sajal = 10400 × 2 = 20800

Total salary of Aarush and Manish = 7800 × 2 = 15600

Total salary of Manish and Neeraj = a

According to the question,

 19600 + 20800 + 15600 + a
                          2                       
= 36400

56000 + a = 72800

a = 72800 − 56000

a = 16800

Average =
16800
      2      
= Rs 8400

Answer 4. (A) 19.5 years

Explanation:

Let the total age of 25 students, 1 teacher and 1 principal = a years

Age of teacher = 30 years

Age of Principal = 30 + 5 = 35 years

Total age of another two teachers = x years

According to the question,

 26a − 30 − 35 + x
             26             
= a − 1

26a − 65 + x = 26a − 26

− 65 + x = − 26

x = 65 − 26 = 39

Average =
39
  2 
 = 19.5 years

Answer 5. (D) 24.25 years

Explanation: 

Total students in four section = 50 + 40 + 65 + 45 = 200

Pass students = 50 × 48% + 40 × 55% + 65 × 60% + 45 × 40%

= 24 + 22 + 39 + 18 = 103

Fail students = 200 − 103 = 97

Average =
97
 4  
 = 24.25

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