Do the following activity. Calculate the given problem and write the solution and answer for each.

1. Al and Irene both work at night shifts. Al has every sixth night off and Irene has every fifth night off. If they both have tonight as night off, how many nights before they are both off at the same time again?

2. The Pro Football Encyclopedia gave the following ages for a random sample of football players: 24,23,25,23,30,29,28,26,33,29,24,37,25,23,22,27,28,25,31,29,25,22,31,29,22,28,27,26,23,21 . Calculate the median (2 decimal points).

3.Compute for the range of the data: 72, 75, 75, 78, 80, 80, 83, 85, 88, 90, 80

4. The Pro Football Encyclopedia gave the following ages for a random sample of football players: 24,23,25,23,30,29,28,26,33,29,24,37,25,23,22,27,28,25,31,29,25,22,31,29,22,28,27,26,23,21 . Calculate the mode.

5.The Pro Football Encyclopedia gave the following ages for a random sample of football players: 24,23,25,23,30,29,28,26,33,29,24,37,25,23,22,27,28,25,31,29,25,22,31,29,22,28,27,26,23,21 . Calculate the variance (2 decimal points).

6.The sum of 10 test scores is 400. What is the mean score?

7.A man buys a horse for 150000Php. Sells the horse for 160000Php. Rebuys the horse for 170000Php. Sells the horse for 180000Php. How much did he gain in the end?

8. Rico's age is three years more than four times Rica's age. After five years, Rico's age will be one year more than thrice Rica's age. What is Rico's present age?

9. A random sample of 20 Math 21 score is listed: 29, 26, 13, 23, 23, 25, 17, 22, 17, 19, 12, 26, 30, 30, 18, 14, 12, 26, 17, 18. Calculate the sample mean and standard deviation.

10.Kimmy and Jane bought the same item. Kimmy bought it for 20% less than the list price. Jane said if she paid 25% more, she would have paid the list price. Who paid less?

A. Kimmy B. Jane C. They paid equal list price D. The problem is unsolvable because the information is insufficient.