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Finding Mean for Grouped Data When Class Intervals Are Not Given

Find the mean...

Question

Find the mean of 2a-3b and 2a+3b

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Solution

Mean = (2a - 3b + 2a + 3b)/2

= 4a/2

= 2a

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Similar questions

x = \frac{\sqrt{2 a + 3 b} + \sqrt{2 a - 3 b}}{\sqrt{2 a + 3 b} - \sqrt{2 a - 3 b}}

, the prove that

3 b x^{2} - 4 a x + 3 b = 0

Q. Evaluate the product of

(2 a + 3 b) (2 a - 3 b)

Q. Find and correct errors of the following mathematical expressions:

(2 a + 3 b) (a - b) = 2 a^{2} - 3 b^{2}

2^{a} + 3^{b} = 17

2^{a + 2} - 3^{b + 1} = 5,

then find the value of a and b.

(2 a + 3 b)^{3} - (2 a - 3 b)^{3}

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Finding Mean for Grouped Data When Class Intervals Are Not Given

Standard VIII Mathematics

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