Chapter 13.4, Problem 26STP

To determine

To calculate:

Probability that at least one of the group of $3$ coins will land with heads up.

Answer to Problem 26STP

Probability that at least one of the group of $3$ coins will land with heads up is $0.9$ .

Explanation of Solution

Given information:

 A. $0.1$

 B. $0.2$

 C. $0.3$

 D. $0.9$

A person tosses groups of three coins a total of $10$ times. Out of those $10$ tosses, there are $9$ groups of coins that show at least one heads up.

To find the approximate probability that at least one of the group of $3$ coins lands heads up.

The approximate probability that at least one of the groups of $3$ coins lands heads up is equal to the number of groups with heads up observed divided by total no. of groups of coins observed.

  $P$ ( at least one heads up group):

  $\begin{array}{l}=\frac{9}{10}\\ =0.9\end{array}$

Therefore, correct answer is $0.9$ that is option (D).