Jillian numbered 10 counters from 1 through 10 and placed them in a cloth bag. She then performed an experiment where she drew one counter, recorded its number, and then replaced it. Jillian did this 25 times. The results of Jillian's experiment are shown in the table.

Jillian's Experiment
Counter
Number Number of
Times Drawn
1 2
2 4
3 3
4 3
5 2
6 3
7 1
8 3
9 2
10 2

What is the experimental probability of drawing a number 9 counter followed by a number 3 counter?
A.

B.

C.

D.

1 answer

To find the experimental probability of drawing a number 9 counter followed by a number 3 counter, we first need to determine the number of times each counter was drawn, as well as the total number of draws.

From the data provided:

  • The counter number 9 was drawn 2 times.
  • The counter number 3 was drawn 3 times.
  • The total number of draws is 25.

The experimental probability of drawing a number 9 counter is calculated by taking the number of times the 9 counter was drawn and dividing it by the total number of draws:

\[ P(9) = \frac{\text{Number of times 9 was drawn}}{\text{Total number of draws}} = \frac{2}{25} \]

Next, we calculate the experimental probability of drawing a number 3 counter given that a number 9 has already been drawn and replaced. The probability of drawing a number 3 counter is:

\[ P(3) = \frac{\text{Number of times 3 was drawn}}{\text{Total number of draws}} = \frac{3}{25} \]

Since the draws are independent (because the counter is replaced each time), we can find the combined probability of both events happening in sequence by multiplying the probabilities:

\[ P(9 \text{ followed by } 3) = P(9) \times P(3) = \frac{2}{25} \times \frac{3}{25} = \frac{6}{625} \]

Thus, the experimental probability of drawing a number 9 counter followed by a number 3 counter is:

\[ \frac{6}{625} \]

This result corresponds to none of the provided options (A, B, C, D) as they are not specified with values in your question. However, the finalized answer is \(\frac{6}{625}\).