MATH HELP PLEASE!!!

Mathematics

1 answer:

konstantin123 [22]4 years ago

3 0

(1) The stem and leaf plot is a table organized by the first few (stem) digits with leaves (the rest digits) listed in corresponding rows. The solution depend on how your teacher expects stems to be defined (how many digits). Here's a link describing how to construct them. It is fairly straight-forward. https://www.mathsisfun.com/data/stem-leaf-plots.html

(2) the distribution (see image) is not really strictly symmetric. so I would choose (B)

(3) the distribution (see 2nd image) might be seen as "roughly normal" especially looking at the available options, choice (C) is the only plausible.

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pedro's school had an ice cream social to help raise money for a school trip. how many ways can ice cream be ordered with 2 diff

NeTakaya

So, say order mattered. If we had x toppings and we only wanted groups of two different toppings, we would have x toppings for the first option, and x-1 toppings for the second option since we've already used a topping. Using the multiplication rule that would give us x(x-1) different groups, if order mattered, which is written as:

$_xP_2=\frac{x!}{(x-2)!}=x(x-1)$

So, in this specific problem order does not matter. We see that we've overcounted because for every pair of toppings we have, they can be reordered 2!=2 ways. So that means we must divide by two to get:

$\frac{x(x-1)}{2}$