SOLUTION: So far, I have been able to figure out probabilities when they are exact, fewer, at least, or between numbers however, this one took me for a loop; the "or" has me puzzled. 45%

Question 1146299: So far, I have been able to figure out probabilities when they are exact, fewer, at least, or between numbers however, this one took me for a loop; the "or" has me puzzled.
45% of Americans were satisfied with their current jobs. Answer the following questions based on random sample of 15 American workers.
What is the probability that either four or five employees were satisfied with their current jobs?
Thank You!
Found 2 solutions by richwmiller, greenestamps:
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
If five were satisfied then four were
Answer by greenestamps(13215) (Show Source): You can put this solution on YOUR website!

I don't see why "or" with two numbers is more confusing than "fewer than", or "at least", or "between a and b"....

P(4 are satisfied) = (15C4)*(.45^4)*(.55^11)
P(5 are satisfied) = (15C5)*(.45^5)*(.55^10)

Add the two probabilities....
RELATED QUESTIONS
I need to find the partial sum of 1+5+9+...+109 I understand how to find partial sum.... (answered by MathTherapy)
What is the age distribution of patients who make office visits to a doctor or nurse? The (answered by richard1234)
Hello! Thank you to anyone who may be taking time out of their day to read this. I am... (answered by math_helper)
this is the kind of problem that I am having trouble with: Two numbers differ by 6 and... (answered by jim_thompson5910)
Hi! I need help with "row operations". From what I have researched and studied, I... (answered by Theo)
Find two consecutive odd integers such that 5 times the first integer is 12 more than 3... (answered by Earlsdon)
I am having problems with this question. I'm not sure what equation to use or how to go... (answered by Theo)
Two riders on bicycles, 100 miles apart, begin traveling toward each other at the same... (answered by Paul)
Figuring out graphing of this polynomial: f(x) = 12x^3 - 12x^2 - 24x what I have... (answered by josgarithmetic)