In the given below table, the mean is 21.12, then find the value of k.
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The mean of the frequency table given below is 50.Then find out the values of a and b. .

The mean and variance of 8 observations are 9 and 9.25 respectively. Suppose 6,7,10,12,12,and 13 are the first 6 observations. Let a and b be the remaining two observations Find the value of a^2+b^2

The mean and variance of 8 observations are 9 and 9.25 respectively. Suppose 6,7,10,12,12,and 13 are the first 6 observations. Let a and b be the remaining two observations. Find the value of a+b.

The electronic configuration of some element are given below Is the number of electrons in the outermost shell of these elements the same as that of the elements in the Table .

Analyse the table given below and answer the questions. Find out the metals which are likely to be A,B and C from the box given below. Ca Cu Mg

In the table below two of the width, length and their ratio of some rectangles are given. Calculate the third and fill up the table.

Given the following data find the mean of the given data.

Analyses the table given below: Which of the ores mentioned in the above table can be concentrated by magnetic separation method? Justify your answer.

Analyse the table given below and answer the questions. Write down the chemcial equation between metal 'B' and water.

Analyse the table given below and fill in the blanks.