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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Women's President of Indian National Congress

Women's President of Indian National Congress, ഇന്ത്യൻ നാഷണൽ കോൺഗ്രസിന്റെ പ്രസിഡന്റായ വനിതകൾ, CODE -ASINS .

A- ANNIE BESANT(1917).
S- SAROJINI NAIDU(1925).
I- INDIRA GANDHI(1959).
N- NELLI SENGUPTA(1933).
S- SONIA GANDHI(1998).
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Problems on Train with Explanation and Shortcuts

Formula :  .

Train Speed = Distance / Time.


Points to Remember .

To change km/hr into m/sec, we need to multiply it by 5 / 18. .

Example:.

90 km/hr means.

90 x 5 / 18.

= (5 x 5 ).

= 25 m/sec.

And if we need to convert m/sec into km/hr, we multiply it by 18 / 5.

Example:.

90 m/sec means.

90 x 18 / 5.

= ( 18 x 18 ).

= 324 km/hr.

Time taken by a train of length l meters to pass a pole or standing man or a signal post is equal to the time taken by the train to cover l meters.
Time taken by a train of length l meters to pass a stationary object of length b meters is the time taken by the train to cover (l + b) meters.
Suppose two trains or two objects bodies are mo...

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Important Maths Formulas ( പ്രധാനപ്പെട്ട ഗണിത സൂത്രവാക്യങ്ങൾ )

Important Maths Formulas .

(a ± b) 2 = a 2 ± 2ab + b 2 .


(a + b + c) 2 = a 2 + b 2 + c 2 + 2(ab + bc + ca).


(a + b + c + d) 2 = a 2 + b 2 + c 2 + d 2 + 2(ab + ac + ad + bc + bd + cd) .


Geometry formulas .

Perimeter ( ചുറ്റളവ് ) .


Perimeter of a square: P=4a.

    a: length of one side.


Perimeter of a rectangle: P=2(l+w).

    l: length.

    w: width.


Perimeter of a triangle: P=a+b+c.

    a, b, and c: lengths of the 3 sides.


Area ( വിസ്തീര്‍ണ്ണം ) .
LINE_FE...

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