Math, asked by yashd4448, 1 year ago

The mean of 20 observations is 12.75. if 2 marks are deducted from each observation, show that the mean marks are also reduced by 2.

Answers

Answered by adyabharadwaj

8

12.75×20=255
255-2×20=215
mean=215÷20=10.75
.•.12.75-10.75=2

Previous Question

Next Question

Similar questions

Biology, 6 months ago

Define sericulture. Name the two process involved in sericulture.

Math, 6 months ago

What is the predecessor of 100...

Social Sciences, 6 months ago

Which among the following natural vegetation is most predominant in India ? Mangrove forests Tropical Deciduous forests Thorny forests Tropical Evergreen forests ...

Physics, 1 year ago

how to estimate the thickness of oliec acid...

Science, 1 year ago

The efficiency of air standard otto cycle depends on...

Social Sciences, 1 year ago

advantages and disadvantages of Amaravathi in telugu...

English, 1 year ago

Benjamin Franklin was a prolific inventor. He invented the lightning rod, the Franklin stove, studied electricity, discovered the Gulf Stream, started the first library, and on and on. Among his many other inventions, what musical instrument did he invent?

English, 1 year ago

What invention is credited to the Russian born American inventor Vladimir Kosma Zworykin?