Each of three friends flips a coin 85 times. The results for each friend are shown in the tables. Find the relative frequency for the event "heads" for each friend. If the friends combine their results to get
130 heads and 125 tails, what is the relative frequency for the event "heads"? Use pencil and paper.
Suppose each friend flips a coin 850 times. Is there a value you would expect the relative frequency
for the event "heads" to be close to?