Question

the average age of three man "X" ,"Y" and "Z" is 75 kgs if A joins the average age is 80 kgs if another man whose weight is 5 kgs more than A replaces X then average weight of Y Z A and B will be 85 kgs what is the weight of X solution

Answer 1

Step-by-step explanation:

Average weight of three men X,Y and Z=75 kgs.

∴ Total weight of three men X,Y and Z=75×3=225 kgs.

A joins the group and average weight =80 kgs

∴ Total weight of this group =80×4=320 kgs.

∴ weight of A=320−225=95 kgs.

∴ weight of B is 5 kg more than A.

∴ weight of B=95+5=100 kgs.

Total weight of X,Y,A and Z=320 kgs.

Total weight of X,Y,A,B and Z=320+100=420 kgs.

Total weight of Y,Z,A and B=85×4=340 kg.

∴ weight of X=(420−340)=80 kgs.