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Properties of Determinants

Which of the ...

Question

Which of the following is true?

A) 120 ÷ 50 = 50 ÷ 120
B) 150 – 70 = 70 – 150
C) 120 + 320 = 320 + 120
D) None of these

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Class Intervals	$30 - 40$	$40 - 50$	$50 - 60$	$60 - 70$	$70 - 80$
Frequency	$120$	?	$200$	?	$185$
Cumulative Frequency	$120$	?	?	?	$900$

Frequency for class

40 - 50 =

?

Q. Find the missing frequencies in the following frequency distribution whose mean is

50

and total frequency is

150

.

$x$	$10$	$30$	$50$	$70$	$90$	$T o t a l$
$f$	$17$	$f_{1}$	$32$	$f_{2}$	$19$	$120$

Find the median of the following data set.

70 50 90 120 110 100 80 60

Q.
Data: 70, 50, 90, 120, 110, 100, 80, 60
The median of the data set is

Q. The following table gives the distribution of the average weekly wages of

800

workers in a factory. Calculate the median for the data given below.

Wages ( in hundreds)	$20 - 25$	$25 - 30$	$30 - 35$	$35 - 40$	$40 - 45$	$45 - 50$	$50 - 55$	$55 - 60$
No. of persons	$50$	$70$	$100$	$180$	$150$	$120$	$70$	$60$

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Properties of Determinants

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