Answer:
?
Step-by-step explanation:
25%
since there are 4 books, and only one is a mathematics book, there is a 1/4 chance. in other words, 25%
Answer:
The standard deviation will be: 2.1
Step-by-step explanation:
We know that standard deviation is basically the square root of variance.
Using the formula to calculate the standard deviation

As
so the standard deviation can be calculated as:
standard deviation 


Therefore, the standard deviation will be: 2.1
Answer:
what you have written that