From all the employees of the IO Company, 30% decided to go on vacation in January.
The company is made up three different sector: 45% of the workers are in sector IO-I and 20% work in sector OI-2.
It is known that 20% of the employees of sector IO-1 and 35% of employees of sector IO-2 decided to go on vacation in January, so the percentage of workers of sector IO-3 who decided to take their vacation in January is:
a) 14%
b) 29%
c) 38%
d) 40%
e) 47%
Um comentário:
R: d) 40%
Porque:
- O sector III tem 35% dos funcionários da empresa (100-65%)
- Do sector I vão de férias 9% dos funcionários da empresa
- Do sector II vão de férias 7% dos funcionários da empresa, logo no sector III só poderão ir de férias 14% do total de funcionários da empresa. Sendo que o sector emprega 35% do total, poderão ir de férias 40% dos funcionários do sector III
0.3=(0.45*0.2)+(0.2*0.35)+[(1-0.45-0.2)*X]
X = 0,4 = 40%
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