I tried the following solution, not sure about the accuracy of the results though

Coin Toss

Number----------- Probability

of Heads--------- of Outcome

x --------------- P(x)

0 --------------- 1/2 = 0.5

1 --------------- 1/2 = 0.5

Total------------ 2/2 = 1

Mean of a probability distribution

Variance

Standard Deviation

In one toss of a fair coin, we expect ___0.5_____ heads, give or take ___0.5____ heads or so.

In n=100 tosses, we expect ___50______ heads, give or take ___5___ heads or so

In n=400 tosses, we expect ___200_____ heads, give or take ___10____ heads or so.