According to a survey of business firms in a certain city, 750 firms offer their employees health insurance , 640 offer dental insurance and 280 offer health insurance and dental insurance. How many firms offer their employees health insurance or dental
A. 920
B. 1,100
C. 1,110
D. 1,030
E. 1,490
সঠিক উত্তরঃ
C.
1,110
Explanation:
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