Five coins were simultaneously tossed 1000 times, and at each toss the number of heads was observed. The number of tosses during which 0, 1, 2, 3, 4 and 5 heads were obtained are shown in the table below. Find the mean number of heads per toss mmmmmmmmmmmmmmmmmmmmmmmmmmmmm No. of heads per toss `(x)` : 0 1 2 3 4 5 No. of tosses `(f)` : 38 144 342 287 164 25