# 5-3 homework chapter 6

### Question:

What is the probability formula?

### Answer:

Probability is a branch of math that uses numbers to show how likely it is that something will happen or that a statement is true. The chance that something will happen is a number between 0 to 1, where 0 is supposed as it will never happen and 1 is that it will happen for sure. Write the odds of each event using symbols like P in italics (X 5).

(a) At least four correct answers on a 15-question quiz (where X is the number of right answers).

(b) Out of every 25 emails, less than 5 are “phishing” emails (where X is the number of “phishing” emails).

(c) If there are 16 people invited to a party, no more than 5 won’t show up (X = number of no-shows).

A: P(X ≥ 4)

B: P(X < 5)

C: P(X ≤ 5)