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#### karush

##### Well-known member

- Jan 31, 2012

- 2,924

11,9,10,8,13,9,6,7,10,11

a) Use Tim's data to get the probability of obtaining a head.

the ans to this was .47 but I don't know how that was derived

b) He tossed the 20 coins for the 11th time, How many heads should he expect to get?

I would guess 9 but not sure what the mathematical calc would be

c) He tossed the coins 1000tmes. How many heads should he expect to see.

since this a much longer data base I would think this would smooth out to

50% or 500 heads