RBI had released advertisement for 926 posts of Assistant and now the prelims are over. Students should start preparing for RBI Assistant Mains 2020. Do not let this opportunity slip away. Adda 247 will provide you daily Quantitative Aptitude Mock of “RBI Assistant Mains Daily Quant Mock 19th February 2020. From now on, Adda 247 will provide students with Mocks for RBI Assistant Mains that will help you to practice maximum topics in minimum time. **This mocks contains Average & Ages****. **Stay tuned with bankersadda to get Quant Quiz and boost your preparation for the upcoming bank exam. You can also prepare with the **study plan** for RBI Assistant available on the bankersadda website.

**Q1. Average age of a man, woman and their son is 30 years. Man’s age is two year more than his wife and age of son is 1/4th the sum of age of his mother and father. When two other family members were added, new average becomes 27 years. If difference between age of two new members are one year then find difference between son and the new member who is elder. **

(a) 7 years

(b) 8 years

(c) 4 years

(d) 2 years

(e) 5 years

**Q2. The average age of a group of six children is 15 years. From the group, two children left, whose ages were 3 years more and 5 years more than the average age. 4 new children, whose average age is 4 years more than the given average age, join the group. Find the new average age.**

(a) 15 years

(b) 16 years

(c) 17 years

(d) 18 years

(e) 12 years

**Q3. Ratio of ages of Amit and his father 5 years ago is 2 : 5. If age of his mother is 20% more than the present age of his father. Then find difference of age of his father and mother after 10 years given that age of Amit 3 year hence will be 32 years? **

(a) 11 years

(b) 13 years

(c) 8 years

(d) 17 years

(e) 15 years

**Q4. Average weight of group of some children increases by 1 when 2 children join them. If instead of these 2 children another 2 children join the group then average decreased by 1 but total weight becomes more than initial weight. If difference between the sums of weight of 2 children of previous one to later one is 14 then find the initial number of children in group. **

(a) 7

(b) 5

(c) 3

(d) 6

(e) None of these

**Q5. The second lowest number of five consecutive odd number series is four more than the 5/12th of the third highest number of a five another consecutive even number series. If the average of five consecutive even number series is 60, then find the difference between the highest number of both the series?**

(a) 27

(b) 29

(c) 31

(d) 33

(e) 37

**Q6. The Ratio of ages of Mr. A and his wife are 4:3, and his son age’s is 30% of the age of Mr. A. the age of his daughter is 50% more than that of his son. 5 years ago, the average age of his wife and daughter is 31 years. find out the difference between average age of his wife and daughter and that of Mr. A and his son.**

(a) 3 years

(b) 4 years

(c) 8 years

(d) 6 years

(e) 7 years

**Q7. Average age of Veer, Ayush and Sameer is 26 year and after 3 years average age of Veer, Ayush and Divyaraj will be 86/3 years. If sum of present age of Sameer and Divyaraj is 53 year then find the present age of Sameer. **

(a) 29 year

(b) 27 year

(c) 25 year

(d) 28 year

(e) 26 year

**Q8. Average marks of Sandeep are decreased by 2 when he excludes 40 marks of social science and include 28 and 30 marks of physics and chemistry respectively. If he again add 54 marks of computer science the average becomes equal to original average. Find the number of subjects originally.**

(a) 8

(b) 9

(c) 10

(d) 12

(e) 15

**Q9. The ratio of two positive number is 5:7 and average of the same two number is 222 then find out the difference between both numbers?**

(a) 36

(b) 72

(c) 64

(d) 74

(e) 38

**Q11. Average of five numbers is 91. Average of first, third and fifth number is 83 and second number is less than or equal to the fourth number. Then, find the maximum possible value of second number. **

(a) 206

(b) 153

(c) 105

(d) 103

(e) Cannot be determined.

**Q12. The average of four distinct prime number p, q, r and s is 54. Where p < q < r < s. p and s are equidistant from 55 whereas q and r be equidistant from 53. p and q are equidistant from 45 whereas r and s are equidistant from 63. Find difference between p and s.**

(a) 20

(b) 24

(c) Can’t be determined

(d) 25

(e) 27

**Solution:**

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