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Select the correct answer.

A fair, unbiased coin was flipped 10 times, giving the results shown in the table, where [tex]$T =$[/tex] tails and [tex]$H =$[/tex] heads.

\begin{tabular}{|c|c|c|c|c|c|c|c|c|c|c|}
\hline Flip & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 \\
\hline Result & [tex]$T$[/tex] & [tex]$T$[/tex] & [tex]$T$[/tex] & [tex]$H$[/tex] & [tex]$T$[/tex] & [tex]$T$[/tex] & [tex]$T$[/tex] & [tex]$H$[/tex] & [tex]$T$[/tex] & [tex]$T$[/tex] \\
\hline
\end{tabular}

What is the difference between the theoretical and experimental probabilities of getting heads?

A. 0.5
B. 0.0
C. 0.1
D. 0.3


Sagot :

Certainly! Let's work through the problem step-by-step.

1. Understanding Theoretical Probability:
- For a fair, unbiased coin, the probability of getting heads (H) is 0.5, and the same is true for getting tails (T).
- This is because there are only two possible outcomes, both equally likely.

2. Flipping the Coin and Results:
- The coin is flipped 10 times. The results are as follows: T, T, T, H, T, T, T, H, T, T.

3. Calculating Experimental Probability:
- To find the experimental probability, we need to count the number of heads obtained and divide by the total number of flips.
- In this series of flips, there are 2 heads (H) out of 10 flips.
- Experimental probability of heads is calculated as:
[tex]\[ \text{Experimental Probability} = \frac{\text{Number of heads}}{\text{Total number of flips}} = \frac{2}{10} = 0.2 \][/tex]

4. Finding the Difference:
- The theoretical probability of getting heads is 0.5.
- The experimental probability of getting heads is 0.2.
- The difference between the theoretical and experimental probabilities is:
[tex]\[ \text{Difference} = | 0.5 - 0.2 | = 0.3 \][/tex]

5. Selecting the Correct Answer:
- The possible answers are:
A. 0.5
B. 0.0
C. 0.1
D. 0.3
- From our calculation, the difference is 0.3, which corresponds to option D.

Therefore, the correct answer is:
D. 0.3