22AWest Coast refinery used the following stocks of oil in a

22AWest Coast refinery used the following stocks of oil in a production run of gasoline. The respective costs of these stocks are shown in the adjacent column. Barrels Unit cost Light Arabian crude oil High-sulfur Alaskan oil Methyl alcohol from corn 5,000 20,000 1,000 6,000 $64 53 84 60 Texas medium weight crude The average cost per barrel is, 62.50 65.25 60.75 57.00 The annual salary of the staff members in a state government agency are shown below. The first column shows the annual salary and the second column the frequency (the number of employees earning that sala 23 ry) Annual Sala $104,000 92,000 81,000 60,000 46,000 31,000 Frequenc 2 8 20 6 The mean salary of agency\'s staff is: $69,000 $62,545 $54,262 $51,374

Solution

22. Option d

Barrels

Unit Cost

Cost

5000

64

320000

20000

53

1060000

1000

84

84000

6000

60

360000

Total No of Barrels

32000

Total cost

1824000

Average cost per barrel = Total cost/Total no of barrel

57

23. Option c

Annual Salary

Frequency

Salary

104000

1

104000

92000

2

184000

81000

5

405000

60000

8

480000

46000

20

920000

31000

6

186000

Sum of salary

2279000

n

42

Mean Salary

sum of salary/n = $54262

	Barrels	Unit Cost	Cost
	5000	64	320000
	20000	53	1060000
	1000	84	84000
	6000	60	360000
Total No of Barrels	32000
Total cost	1824000
Average cost per barrel = Total cost/Total no of barrel	57