Question

The average wage of a group of 20 labourers is Rs. 500. If 4 persons receiving average wage of Rs. 360 leave the group and 2 persons receiving average wage of Rs. K join the group, then the average wage of the group increases by Rs. 55. Find the value of ‘K’.

A 715
B 705
C 725
D 775
E None of these
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