Tips and Ticks Average calculation


Tips and Ticks Average calculation

N = the number of terms 

S = the sum of the numbers in the set.

Average = S/N


For example

The marks of a student in five subjects are 96, 94, 92, 87, and 81, then what is the average score of the student?

N = 5

S = 96 + 94 + 92 + 87 + 81 = 450

A = 450/5 = 90.


Another type questions

1). There are 36 boys and 44 girls in a class. The average score of boys is 40 and girls are 35. Then what will be the average mark?


Total mark of 36 boys = 36 x 40 = 1440

Total mark of 44 girls = 35 x 44 = 1540

Total mark of 80 Students = 1440 + 1540 = 2980 

Average mark of the class = (2980 / 80)

                                          = 37.25


2). The average weight of 15 members in a football team is 24 kg when a new member included, the average weight increases by 2. What is the weight of the new member?


Total weight of 15 member = 24 x 15 = 360 

Average after including a new member = 24 + 2 = 26 

Total weight of 16 member = 26 x 16 = 416 

Weight of the new member = Total weight of 16 member - Total weight of 15 member

    = 416 - 360

    = 56.

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പട്ടിക ജാതികാരുടെ പാ. വ 💥പട്ടിക ജാതിക്കാർ കൂടുതൽ പാലക്കാട്‌ കുറവ് വയനാട് വയനാട്, മതി.. ബാപാ വയനാട് ജില്ലയിലെ പുഴകൾ 👇🏼 1 മനന്താ വാടി 2 തിരുനെല്ലി 3 ബാവലി പുഴ 4 പനമരം 1984 ൽ ഇന്ദിരാജി കൊൽക്കത്തയിൽ മെട്രോയിൽ അണ്ടർഗ്രൗണ്ടിലൂടെ സഞ്ചരിക്കുമ്പോൾ ആണ് ഒരു ബ്ലൂ സ്റ്റാർ കണ്ടത് ഓപ്പറേഷൻ ബ്ലൂ സ്റ്റാർ = 1984 ഫസ്റ്റ് മെട്രോ in ഇന്ത്യ =1984(കൊൽക്കത്ത ) ഫസ്റ്റ് underground metro in ഇന്ത്യ = കൊൽക്കത്ത ഒരു സ്വാമി ക്ര...

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Time and Work Problems - Shortcut Tricks and Formulas

Problems Type 1: .

A can finish work in X days. .

B can finish work in Y days.


Both can finish in Z days = (X*Y) / (X+Y). .


Problems Type 2: .

Both A and B together can do work in T days.

A can do this work in X days.


then, B can do it in Y days = (X*T) / (X-T) .


Problems Type 3: .

A can finish work in X days.

B can finish work in Y days.

C can finish work in Z days.


Together they can do work in T days = (X*Y*Z)/ [(X*Y)+(Y*Z)+(X*Z)] .


Problems Type 4: .

A can finish work in X days.

B can finish work in Y days.


A*X = B*Y.

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Handshake Problem

Suppose there are n people in the party. The first person shakes hand with the other (n-1) guests. The second guest shakes hand with the other (n-2) guests. this will continue until the (n-1) th guest shakes hand with the nth guest.

Total number of handshakes is (n-1) + (n-2).. + 3 + 2 + 1. .

= ((n-1)(n))/2 .

For example, 6 people in a party shake hand with other guests. So how many handshakes will be there?.

=((6-1)(6))/2.

=15.

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