Statistics during an extended vacation, you plan to read 3 books out of the 10 on your shelf that you've been meaning to read. how many different groups of 3 books might you take with you to read on vacation? answer choices: 120. 720. 1,000. 30.

120

Step-by-step explanation:

The number of ways to select things from a group of things is given by the combination formula.

Where n! means n*(n-1)*(n-2)....

Plugging these into the formula gives us:

Hence, there can be 120 different groups of 3 books that u can choose from 10 books total.

-362

step-by-step explanation:

(12)(4)+2(12)-34(12)+2(12)-3

  \/         \/         \/         \/

  48 +   24 -   408 + 24 - 3

      \   /               \   /

          72     -     432 - 3 = -363

there is only one way to arrange all the eight relative to each other because they are not distinct. we have

now there are nine places to place an (and not more than one in one place).   because we have four symbols, we need to choose four of these nine places to insert an . order does not matter because the are not distinct.

thus there are 1 · c(9,4) ways, or, if we calculate it,

thus there are 126 ways to form such "words."