Answer:
Step-by-step explanation:
We know that:
So
So
During a catered lunch, an average of 4 cups of tea are poured per minute. The lunch will last 2 hours. How many gallons of tea
2 answers:
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Answer:
5.77% probability of being correct 14 or more times by guessing
Step-by-step explanation:
For each time the coin is tossed, there are only two possible outcomes. Either the person predicts the correct outcome, or she does not. The probability of predicting the correct outcome in a toss is independent of other tosses. So we use the binomial probability distribution to solve this question.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.
In which is the number of different combinations of x objects from a set of n elements, given by the following formula.
And p is the probability of X happening.
A coin is tossed 20 times.
This means that
Fair coin:
Equally as likely to be heads or tails, so
What is the probability of being correct 14 or more times by guessing
In which
Then
5.77% probability of being correct 14 or more times by guessing