Answer:



Step-by-step explanation:
Given
The table
First, we calculate the amount of schools


Solving (a): Probability of 75+ computers.
From the given table, schools with 75 or more computers have the population of:


The probability is calculated as:



Solving (b): Probability of less than 75 computers.
From the given table, schools with less than 75 computers have the population of:


The probability is calculated as:



Solving (c): Probability of less than 10 computers.
From the given table, schools with less than 100 computers have the population of:


The probability is calculated as:



Answer:
Step-by-step explanation:
1=12=+1
Answer:
drawing a blue marble is a harder then the yellow but not as hard as the red.
Answer:
x = 3 , -1 +
, -1 - 
Step-by-step explanation:
⇒ 
⇒ 
now, for zeros of
,
⇒ x =
± 
⇒ x =
± 
⇒ x = -1 ± 
hence, all the roots are,
x = 3, -1 +
, -1 - 