 Ques 1 Of Average problems, : The Average age of 10 students in a class is 20 years. If a new student is included then the new average age of students increased by 1 year. The age of new student is. 21×1+10×1=31 year  Ans.

Ques of average problems : The Average Weight of 20 four wheelers is 180 kg. If an old car is removed from this group of four wheelers. the new average weight decreased by 2 kg . the weight of the removed car is. 178×-1+20×-2=218 kg  Ans.

Ques 3 : The Average age of 6 servants in my house is 28 year. A new young Servant Replace an old servant then the new average Reduce by 1 year. The age of servant is. 27×0+6×-1= -6  Can not Determined

* Because the age of new /old servant is not given,in this case answer will be CND.

* if we were given the age of old servant than;

• If old servant age is 31 then find new servant age.

31 – 6 = 25 year

• if new servant age is 25 year then find old servant age.

25 + 6 = 31 year

Ques 4 : The average weight of A,B,C,D is 40 kg. A new person E included in this group then the average weight of the group is increase by 1 kg Again a new person F replace A then the new average of 5 persons become 42. The average Weight of B,C,D and F is. 41×1+4×1=45

E=45 kg

5×41=205

F,B,C,D,E=5×42=210  → E=45 kg

So F,B,C,D=210-45=165 kg

Average weight of B,C,D,F is 165÷4 = 41.25 kg    Ans.

Ques 5 : The average age in a class is 15 years. Average age increase by 0.2 years in a class after taking admission of 10 new students.Find the average of new students in the class. 15.2×10+40×0.2=160

Average of new students is 160÷10=16 year  Ans.

Ques 6 : 4 Boys and 3 Girls Spent Rs. 120 on an average, of which boys spent 150 on the average. Then the average amount spent by the Girls is.

According to the question

Average:  4B + 3G = Rs. 120

Sum: 4B + 3G = 120×7 = Rs. 840

Average: 4B = 150×4 = Rs. 600

Sum of Girls = 840 – 600 = Rs. 240

Average of Girls = 240÷3= Rs. 80

By Alligation Method 120 – x = 40

X = 120 – 40

X = 80       Ans. Opportunities don't happen. You create them.

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❤️🙏Sir…since I has been preparing for exams,I used to share maths notes in website….but I fears to share ur notes because they provide “quality content” and are very ” powerful” ………(😪

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Percentage chahiye

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sir profit and loss ki trick bhi bataiye

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Sir,
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yep i think answer is 200/3 not 40

5. Pooja Shembale

sir thode questions or post kariye

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Thank u so much sir. What a tricks

7. Aradhana Bhardwaj

Sir average mein innings wale jo questions hote h..unki bhi short trick bta Dena
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amazing tricks always.

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Jaiiiiii mahakal.
Dhasu tricks sir
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It was new for me thanx for this trick