Consider the following frequency distribution : Class : 0-6 6-12 12-18 18-24 24-30 Frequency : a b 12 9 5 If mean =\frac{309}{22} and median =14, then the value (a-b)^{2} is equal to _______. [22 Jul 2021 Shift 2]

Statistics Part 1

Section: Mathematics

Question : 35 of 100

Marks: +1, -0

Consider the following frequency distribution :

Class :	0-6	6-12	12-18	18-24	24-30
Frequency :	a	b	12	9	5

If mean =

309

and median =14, then the value (a−b)2 is equal to _______.

[22 Jul 2021 Shift 2]

Class	Frequency	xi	fixi
0-6	a	3	3a
6-12	b	9	9b
12-18	12	15	180
18-24	9	21	189
24-30	5	27	135
	N=(26+a+b)		(504+3a+9b)

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