Question

A,B & C together earn Rs 300 per day, while A & C together earn Rs 188 and B & C together earn Rs 152. The daily earn of C is:

Answer 1

A + B + C = 300 ............... (1)
A + C = 188 ........................(2)
B + C = 152 ........................( 3) 
subtract (1) - (3)  we get,
A + B +C = 300
A + 152 = 300
A = 300 - 152 
A = 148 
sub A value in (2) 
148 + C = 188
C = 188 - 148 
C = 40

Answer 2

 A+B+C=Rs300                                                                                                                    A+C=188                                                                                                                            B+C=152                                                                                                                             A+B+C=300                                                                                                                       A+188=300                                                                                                                        A=300-188                   

    A=148 

148+C=300                                                                                                                        

C=300-148

C=40