Question

If we toss a coin 100 times, then we expect that heads will appear 50 times. (Points : 1)
True
False <----my answer

We toss two dice 1,000 times. How many times do we expect to have the sum of the two dice equal to 4? (Points : 1)
about 250
about 167
about 83<---- my answer
about 42

We toss 3 coins 100,000 times. How many times do we expect to see "Exactly 1 head" appearing? (Points : 1)
12,500
37,500<--- my answer
3,750
50,000

Answer 1

1. True, it is EXPECTED on an average.
2.83 {1000*(3/36)}
3.37,500 {100,000*3C1/2^3}

Answer 2

When a fair coin is tossed the probability of a head is 0.5. Therefore if a fair coin is tossed many times it is expected that heads will come up half the number of times, this being the most probable number of times.

Answer 3

number 1 is true