. In an economy of 100 people in the labor force, if 10 people are unemployed for 4 weeks during the year, and 30 people are unemployed for 8 weeks during the year, and the rest are employed continuously throughout the year, then the average duration of unemployment in this economy is:A. 4 weeks. B. 7 weeks. C. 8 weeks. D. 20 percent.

option (B) 7 weeks

Explanation:

Data provided in the question:

10 people are unemployed for 4 weeks during the year

30 people are unemployed for 8 weeks during the year

Now,

The average duration of unemployment in economy

= ∑(Number of weeks × Number of unemployed) ÷ [Total number of unemployed]

= [( 4 × 10 ) + ( 8 × 30 ) ] ÷ [10 + 30 ]

= [40 + 240 ] ÷ 40

= 280 ÷ 40

= 7 weeks

Hence, option (B) 7 weeks

d - failures.

the only attempted british colony in north america before 1600 was roanoke, virginia, which was a total failure. england claimed several areas, including newfoundland, but made no sustainable attempts to colonize them before 1600.