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Q. |
-In a statistical investigation of 1000 families of a city, it was found that 60 families had neither a radio nor a TV. 790 families had a radio and 210 families had a TV. How many families in the sample have both? |
A. | 60 |
B. | 0 |
C. | 90 |
D. | 100 |
Answer» A. 60 |
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