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The mean of 100 observations is 50. If one of the observation which was 50 is replaced by 150 then what will be the resulting mean?

Asked by Ankita 05/12/2017 Last Modified 20/03/2018

45 Answers

Learn Mathematics +1 Class IX-X Tuition

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Hello everyone

Which is better? : Online tuitions by brands like: Meritnation, Myschool page or Catalyze or regular tuition classes?

I would suggest offline coaching because it binds the students and gives different levels of class surrounding, which is not possible in online classes. However, for extra self-studies, one can take the help of online material.

Swetha

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599

What are the important topics to cover for ICSE Maths for 9th class students. Also please share any sample blueprints for 2019-2020.

Algebra, e.g. quadratic equations, linear equation, geometry triangle, circle, straight line etc

Rajesh Reddy

0 0

Find the area of a right-angled triangle whose base is 12 cm and height is 5 cm.

Area of a triangle is 1/2 * base * altitude = 1/2 * 12 * 5 = 30 cm^2

Raje

0 0

-2ˆ2 = ?

A) 4

B) -4

(-2)^2 =4. -2^2 = -4

Rahul Mishra

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Solve : x + y = 18; y + z = 12; z + x = 16

Let x+y=18---(1), y+z=12---(2),z+x=16---(3) Solving (2)-(3) we get y+z-z-x=12-16 y-x=-4--(4) Solving (4)+(5) we get x+y+y-x=18-4 2y=14 y=14/2=7 Substitute y value in (1) x+7=18 x=18-7=11 Substitute x value in (3) z+11=16 z=16-11=5 x=11, y=7, z=5

Deepak

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