Answer:
$13.78
Step-by-step explanation:
87.5x.05=4.38
87.5+4.38=91.88
91.88x.15=13.78
3 is my guess, tricky question tough?
Answer: 0.1334
Step-by-step explanation:
Given
There are seven trails with a probability of success is 

Using the binomial distribution, the Probability of exactly no success i.e. x=0 is given by

Answer:
2/5
Step-by-step explanation:
= -5x - x = 2 + x
= -5x - x - x = 2
= x - x - x = -2/5
= -x = -2/5
= x = 2/5