This year, 75% of the graduating class of harriet tubman high school had taken at least 8 math courses. of the remaining class members, 60% had taken 6 or 7 math courses. what percent of the graduating class had taken fewer than 6 math courses? a. 0% b. 10% c. 15% d. 30% e. 45%

B. 10%

Step-by-step explanation:

Let X denote the random variable "Number of courses taking by one student in the Harriet Tubman High School"

For this case we have that information given:

75% of the graduating class of Harriet Tubman High School had taken at least 8 math courses

And that means 25% of the total are taking 7 or less courses

And by the complement rule we can find

And then we can find the probability required like this:

Let E the event:

E=" A student had taken fewer than 6 math courses"

B. 10%

third option: 6x+8

step-by-step explanation:

we can see that the given question is a sum of series and the values of n vary from 0 to 3

the first term will be:

when n=0, [(0)*x+2] => (0+2) => 2

when n=1, [(1)*x+2] => (x+2) => x+2

when n=2, [(2)*x+2] => 2x+2

when n=4, [(3)*x+2] => 3x+2

so adding up all the terms will give us:

=2+x+2+2x+2+3x+2

=x+2x+3x+2+2+2+2

=6x+8

so,

third option is the correct answer ..

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step-by-step explanation:

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