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     EduGorilla 
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    In a survey of defaulted payments of electrical bills of a residential complex of 125 houses, it is found that 50 houses defaulted on their payment of electrical bills in January, 60 in February and 40 in March. Houses can default in consecutive months only. 20 defaulted in January and February. 10 defaulted in February and March. How many houses defaulted in all the 3 months?

    Options :-

    1. 3
    2. 5
    3. 7
    4. 9
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