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x + y =  54 
9 
x – y =  40 
10 
45  = x + 1 
9 
Mother's age  = Smiti's age 
7 
Probability =  10  =  5 
28  14 
x =  8  ,  5 
7  14 
Anuj and Monoj can do the whole work together =  1  

=  1 
5 + 4  
120 
=  120  =  40  days 
9  3 
Anuj's 1 day work =  1 
24 
Anuj's 4 day work =  4  =  1 
24  6 
Remaining work = 1 –  1  =  5 
6  6 
=  5  
6  

=  5 
6  
9  
120 
=  100  days 
9 
Total time =  100  + 4 =  136 
9  9 