Question 6 <
>
An experienced teacher writes an exam so that, on average, about 5% of students will earn an A grade. If she
has 50 students in her class and their performance is independent, what is the probability that at least one
student gets an A?
1
Enter an integer or decimal number (more..)
Check Answer

step-by-step explanation:

we have

using a graphing tool

see the attached figure

this is a quadratic equation (vertical parabola) open up

the vertex is a > vertex

the domain of the function is all real > interval (-∞,∞)

the range of the function is the > [-6.125,∞)

the function has two x->   and

the function is increasing over the > (0.25,∞)

the function is decreasing over the > (-∞,0.25)

2x=70  

x=70/2

x=35

thats the answer

step-by-step explanation: