# * Mathematics

Addition Rule #1 (mutually exclusive) – When two events A and B are mutually exclusive, the probability that A or B will occur is P(A or B) =P (A) + P (B)

I.e. A box contains 3 glazed doughnuts, 4 jelly doughnuts, and 5 chocolate doughnuts. If a person selects a doughnut at random, find the probability that it is either a glazed doughnut or a chocolate doughnut.
-P ( Glazed or Chocolate) = P (Glazed) + P (Chocolate)

sample – a representative part of a larger group
Distributeive property – multiply an expression by multiplying each number inside the ( ) separately 3*(4+6)=30
3*4=3*6=30
10's & 100's system – Naming numbers & can be shown by using base-10 blocks
how many centimeters are in an inch? – 2.54 centimeters
10 Multiplied by 10 then subtracted by 100 – 0
parallelogram – paralel kenar (A parallelogram has 4 sides, with opposite sides parallel. A rectangle is a special kind of parallelogram. Every rectangle is a parallelogram.Congruent sides are the same length)
Alpha is… – Prob of making a type 1error (tell man he is pregnant or fail to reject null hypothesis)
0.05 is 5 in 100 chance of telling man he is pregnant or type 1 error( we set statistical significance at 0.05)
What is an inverse relationship between variables? – As you increase one, the other will decrease.
cross-multiplication – allows us to rewrite and equation between two fractions as an equality between the products of opposite numerators and denominators
The M&M's website says that 20% of milk chocolate M&M's are orange. Let's assume that this is true and set up a simulation to mimic buying 200 small packets of M&M's. Each packet contains 55 candies. We make a dotplot of the results from the simulation (given below). Now suppose that you buy a small packet of milk chocolate M&M's. You find that about 35% (19 out of 55) are orange. Which of the following statements is the most accurate?