Remember that median is the number that ends up in the middle of the list when you rewrite the list in numerical order. Find x: the even numbers are 2, 2, 6, 8. Because 2 and 6 are in the middle, find their mean:
= 4.
So, x = 4. Find y: the prime numbers are 2, 2, 3, 5, 7, 13. Remember: 1 is not prime. Because 3 and 5 are in the middle, find their mean:
= 4.
So, y = 4. Find z: the least is 1, and the greatest is 15. The median of 1 and 15 is
= 8.
So, z = 8. For Quantity A, find the median of 2(4), 4, and 8. So, the median of 4, 8, 8 is 8. Quantity B is also 8.