The average weight of P and his three friends is 55 kg. If P is 4...

Given: The average weight of $P$ and his three friends (=55 $\mathrm{~kg}$) The weight of (P=4 $\mathrm{~kg}$) more than the average weight of his three friends Formula used: The total sum of the terms $=$ Average ($\times$) Number of terms Calculation: The total weight of $P$ and his three friends (=55 $\times$4=220 $\mathrm{~kg}$) Let, the average weight of three friends $=x$ So, the total weight of three friends $=3 x$ The weight of $P=x+4$ Then, $(x+4)+3 x=220$ (\Rightarrow 4 x+4=220) (\Rightarrow 4 $\mathrm{x}=$220-4=216) (\Rightarrow x=216 / 4=54) (\therefore) P's weight (=4+54=58 $\mathrm{~kg}$) (\therefore) The P's weight (in kg) is 58 kg