Answer:
22.60% probability that exactly 3 people are repeat offenders
Step-by-step explanation:
For each driver arrested selected, there are only two possible outcomes. Either they are repeat offenders, or they are not. The probability of an arrested driver being a repeat offender is independent from other arrested drivers. So we use the binomial probability distribution to solve this problem.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.
In which 
is the number of different combinations of x objects from a set of n elements, given by the following formula.
And p is the probability of X happening.
In Illinois, 9% of all drivers arrested for DUI (Driving Under the Influence) are repeat offenders;
This means that 
Suppose 28 people arrested for DUI in Illinois are selected at random.
This means that 
a) What is the probability that exactly 3 people are repeat offenders
This is 
22.60% probability that exactly 3 people are repeat offenders
Answer:
$8400
Step-by-step explanation:
150 x 10 = 1500
$1500 + $6900 = $8400
The answer would be 20,460,000
The price of the watch before the discount is £33.4
<u>Step-by-step explanation:</u>
- Jason bought a watch and a pair of trainers for a total price of £53.55
- The total price he bought has a 15% loyalty discount.
Let us assume,
The original price of the watch and a pair of trainers before the discount = x
- The price 53.55 is less than 15% of x.
- We know that the original price x is 100%
- Therefore, the price 53.55 is 75% of x.
⇒ 
⇒ 
⇒ 
⇒ 
The original price of a watch and a pair of trainers before the discount is £71.4
It is given that,
Before the discount, the trainer's were priced at £38
Before the discount, the total cost = trainer's cost + price of the watch.
⇒ 71.4 = 38 + price of the watch
⇒ Price of the watch = 71.4 - 38 = 33.4
∴ The price of the watch before the discount is £33.4
Answer:
its 10%
Step-by-step explanation:
