Coin B is going to be thrown 4000 times.

Work out an estimate for the number of times

coin B will land on Heads.

2000 times because it will land on heads half of the times it was tossed

The probability of "heads" is ½ and the probability of "tails" is ½.

This means that if we flip this coin several times, we expect it to land on "heads" for half of the time.

If we flip the coin 4000 times, we would expect it to land on "heads" 2000 times, because ½ * 4000 = 2000