Total number of members = 12
Members to choose at a time = 2
This is a combination problem and we are to find the combination of 12 objects taken 2 at a time i.e. we are to find 12C2
12C2 = 66
So, there are 66 ways of selecting a president and vice president.
Therefore, the correct answer is option D
|-5|-(-5)
The absolute value of any number is always positive
5-(-5)
When there is a in front of an expression in parentheses, change the sign of each term in the expression
5+5
Add the numbers
10
Answer=10
In order to find the surface area of a rectangle:
-- Find or measure the length of the rectangle.
-- Find or measure the width of the rectangle.
-- Make sure both quantities are in the same units.
If they're not, then convert one or the other so that they are.
-- Multiply the two numbers.
The product is the area of the rectangle, in units of
square-(the unit in which the dimensions are measured).
