Suppose that 30% of all students who have to buy a text for a particular course want a newcopy (the successes), whereas the other 70% want a used copy. Consider randomly selecting 25purchasers.(a)[3 pts]Find the mean and standard deviation of the number of students who want a newcopy of the book.

Step-by-step explanation:

We know that  30% of all students who have to buy a text for a particular course want a newcopy, whereas the other 70% want a used copy. So, we get that:

p=30%=0.3

q=70%=0.7

n=25.

We calculate the mean:

We calculate the standard deviation:

We get that the mean and standard deviation are:

im not sure

step-by-step explanation:

d) 30 units^2

area of rectangle = l × b

we know,

length = 10 unit

breadth = 3 unit

applying the formula,

= l × b

= 10 × 3

= 30 unit^2

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