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**What is the probability that a randomly selected person has a blood type of A positive?**

There are four blood types (A, B, AB, and O), so the probability of having a blood type of A positive is 1/4 or 0.25.

**2. What is the probability that a randomly selected person has a blood type of either A positive or O negative?**

There are four blood types (A, B, AB, and O), so the probability of having a blood type of A positive or O negative is 1/2 or 0.50.

**3. What is the probability that a randomly selected person has a blood type of B negative?**

There are four blood types (A, B, AB, and O), so the probability of having a blood type of B negative is 1/4 or 0.25.

**4. What is the probability that a randomly selected person has a blood type of AB positive?**

There are four blood types (A, B, AB, and O), so the probability of having a blood type of AB positive is 1/4 or 0.25.

5. **Find the mean, median, mode, range, variance, and standard deviation for the following set of data:**

**2, 4, 6, 8, 10**

Mean: 6 Median: 6 Mode: 6 Range: 8 Variance: 4 Standard Deviation: 2

6. **Find the mean, median, mode, range, variance, and standard deviation for the following set of data:**

**5, 10, 15, 20 **

Mean: 15 Median: 15 Mode: 15 Range: 15 Variance: 25 Standard Deviation: 5

**7. Find the mean, median, mode, range, variance, and standard deviation for the following set of data:**

**1, 4, 7, 10 **

Mean: 5.5 Median: 4 Mode: 4 Range: 9 Variance: 9 Standard Deviation: 3

**8. The following table shows the number of hits per game for five professional baseball players. Find the mean, median, mode, range, variance, and standard deviation for the data.**

**Player Hits Per Game**

**A 2**

**B 3**

**C 3**

**D 4**

E 5 Mean: 3 Median: 3 Mode: 3 Range: 3 Variance: 2 Standard Deviation: 1.4

**6) The following table shows the ages of a group of people. Find the mean, median, mode, range, variance, and standard deviation for the data.**

**Age**

**18**

**19**

**20**

**21**

22 Mean: 20 Median: 20 Mode: 20 Range: 4 Variance: 1 Standard Deviation: 1

**7) The following table shows the ages of a group of people. Find the mean, median, mode, range, variance, and standard deviation for the data.**

**Age**

**15**

**16**

**17**

18 Mean: 16 Median: 16 Mode: 16 Range: 3 Variance: 1 Standard Deviation: 1

**8) The following table shows the ages of a group of people. Find the mean, median, mode, range, variance, and standard deviation for the data.**

**Age**

**13**

**14**

**15**

**16**

17 Mean: 15 Median: 15 Mode: 15 Range: 4 Variance: 2 Standard Deviation: 1.4

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