In the United States, 43% of people wear a seat belt while driving. If two people are chosen at random, what is the probability that both of them wear a seat belt?
How do you get 43% of 43% is 18.49%. I mean, i don't get why do use this method. it doesn't make any sense how this method work.
can you explain in detail please?
2007-01-26 10:34:40 · 2 answers · asked by Ha!! 2 in Science & Mathematics ➔ Mathematics
The first person you choose has 43% chance of wearing a seatbelt.
The second person you choose also has 43% chance of wearing a seatbelt.
The multiplication principle for probability indicates that you multiply those two probabilities together.
So... 43% * 43% = .43 * .43 = .1849 = 18.49%
2007-01-26 10:40:58 · answer #1 · answered by Mathematica 7 · 2⤊ 0⤋
The laws of probability state that if two evnts are independent of each other, then the probability that both will occur is the product of their individual probabilities. Hence The probablity is .43*.43 which equals .1849 = 18.49%.
2007-01-26 18:45:43 · answer #2 · answered by ironduke8159 7 · 1⤊ 0⤋