A student tossed a coin five times and observed results of four tails and one head. He concluded that when a coin is tossed, there is an 80% chance of getting a tail and a 20% chance of getting a head. The conclusion would be more valid if
a. only two tosses of the coin had been used.
b. the weight of the coin had been taken into consideration
c. a greater number of tosses had been used
d. the surface of the coin landed on had been taken in consideration.
Answer: c. a greater number of tosses had been used
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