Answer:
option (B) 7 weeks
Step-by-step 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