65% of the employees in a multinational corporation have VCD players, 75 percent have microwave ovens, 80 percent have ACs and 85 percent have washing machines. At least what percentage of employees has all four gadgets?
Select:
A) (a) 15%
B) (b) 5%
C) (c) 10%
D) (d) 20%
E) (e) 25%
so 35% employees don't have VCD devices.   25% employees don't have MO   20% employees don't have ACs   15% employees don't have WM   Summ of employees that don't have some device = 35%+25%+20%+15% = 95% &lt; 100%   So definitely at least 5% employees have 4 devices.   ans: (b) 5%35 +25 +20 +15= 
<gadget id="calculator">35 +25 +20 +15</gadget>
<output>95</output>
95% &lt; 100%   So definitely at least 5% employees have 4 devices.   ans: (b) 5%
<result>B</result>
65% of the employees in a multinational corporation have VCD players, 75 percent have microwave ovens, 80 percent have ACs and 85 percent have washing machines. At least what percentage of employees has all four gadgets?