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Combination of n Different Things Taken One or More at a Time

57, 54, 58, 5...

Question

$57, 54, 58, 55, 59, 56, 60. ?$

A

64

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B

63

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C

58

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D

57

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Solution

The correct option is B $57$
The series follows the pattern of $- 3, + 4$

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Q. Prepare a discrete series from the following data:

62	50	57	58	51	53	62	64	60	61
60	51	64	55	55	52	60	65	58	60
59	52	63	56	56	58	64	63	62	60

Q. From the following data, calculate coefficient of correlation.

X	57	59	62	63	64	65	58	66	70	72
Y	113	117	126	125	130	128	110	132	140	149

Q. Calculate Karl Pearson's coefficient of correlation between income and expenditure of 10 families from the following data:

Income (in '000)	59	55	58	60	65	63	54	56	66	64
Expenditure (in '000)	52	53	55	58	57	66	59	54	52	54

5^{7} \times 5^{4} \div 5^{8}

Q. The following number are given-

61, 62, 63, 61, 63, 64, 64

60, 65, 63, 64, 65, 66, 64

The difference between their arithmetic mean and median will be:

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