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Question

A coin is tossed 100 times and the probability of getting a tail was found to be 0.6. How many times would a tail have appeared in the 100 times the coin was tossed?
 
  1. 50
  2. 45
  3. 60
  4. 40


Solution

The correct option is C 60
Number of trials = 100
The event in this case is a tail appearing on the coin.
Let the number of times a tail appeared be X.
The number of trials where the event happened = X
We know, for an event E
P(E) = Number of trials in which the event happenedTotal number of trials

Given, P(E)=0.6
X100=0.6
X=60

Hence, a tail would have appeared 60 times.

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