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ATQ, Time taken by Tina alone = 24 days Time taken by Suresh alone = 24 × 1.5 = 36 days Pawan & Raju ---> 12 6 Tina ----> 24 } 72 { 3 Suresh ----> 36 2 Efficiency of Qureshi & Raju = (72 × 0.78)/5.4 - (3 + 2) = 10.4 - 5 = 5.4 Individual efficiency of Pawan, Qureshi & Raju cannot be determined hence Time taken by Qureshi & Raju together to complete the work = 72/5.4 = 13.33 days Hence, Only II statement is possible
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