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.

if gloria has "carry over" minutes, (that is, any minutes paid for but not used in a month can be applied to her payment for minutes in the next month,) her total usage for the three months is: total minutes = 320 + 243 + 489 = 1052 minutes number of 200 minute blocks = 1052/200 = 5 r52 (that is 5 with a remainder of 52) rounding up the number of 200 minute blocks gives her usage for the three months as 6 blocks. the cost for six blocks is 6 x $25 = $150 she also has 200 - 52 or 148 carry over minutes if gloria pays each month and unused minutes are lost, applying the rounding up procedure to each month gives: first month usage of 320 minutes rounds up to 2 blocks of 200 minutes for a payment of 2 x $25 = $50 second month usage of 243 minutes rounds up to 2 blocks of 200 minutes for a payment of 2 x $25 = $50 third month usage of 489 minutes rounds up to 3 blocks of 200 minutes for a payment of 3 x $25 = $75 total payments for the three months are $50 + $50 + $75 = $175 get the plan with carry over minutes!