Question

*WORD PROBLEM* A jar contains dimes and quarters. Twenty percent of the coins in the jar are dimes. A number generator simulates randomly selecting 10 coins from the jar. The number generator is used 12 times and the number of dimes in each trial is shown in the dot plot.
Which description is correct about the number generator is fair or not?




-The number generator is not fair. The dot plot shows a distribution that is skewed right.

-The number generator is fair. The dot plot shows a distribution that is skewed right.

-The number generator is fair. It shows that 20% of the coins selected are dimes most of the time.

-The number generator is not fair. In one of the experiments, no dimes are chosen.

Answer 1

Step-by-step explanation:

20% of the coins are dimes, and 10 coins are selected, so the expected number of dimes is 0.20 * 10 = 2.

So the number generator is fair. It shows that 20% of the coins selected are dimes most of the time.