Answer: D) the last one
Step-by-step explanation:
Answer:
4 hours
Step-by-step explanation:
120-72=48
48÷12=4
Answer:
Third one
Step-by-step explanation:
multiple each numbers by 1/2
Solution: Telemarketing. the probability that a call will reach a live person is 0.2. the calls are independent. (a) a telemarketer places 5 calls. what is the probability that none of them reaches a live person.
Answer: The given random experiment can be considered as binomial experiment with probability of success = 0.2 and number of trials = 5
Therefore, we have:

Let x be the number calls that reach to live person.
We have to find 
Using the binomial probability distribution, we have:



Therefore, the probability that none of them reaches a live person is 0.3277
Answer: all real number / infinity €
15x+23-5x=43+10x
10x+23=43+10x
23=43
€