| Line 4: | Line 4: | ||
^***YES*** | ^***YES*** | ||
| − | + | It means the set containing numbers divisible by 7 union the set containing the numbers divisible by 11 | |
[[Category:MA375Spring2010Walther]] | [[Category:MA375Spring2010Walther]] | ||
| Line 15: | Line 15: | ||
I need some help with 44. Anyone know how to do it? | I need some help with 44. Anyone know how to do it? | ||
| + | |||
| + | For 30h, "or" always means union | ||
| + | |||
| + | For 44, | ||
| + | 1)there are 6 different consecutive positions. | ||
| + | 2)on those consecutive positions there could be 1 or 0. | ||
| + | 3)there are 2^5 ways to fill other positions. | ||
| + | 4)then combine the above ideas together, and it is over to you | ||
Revision as of 17:43, 26 January 2010
Can anyone tell me how to go about doing problem 14?
Can someone help me with #20d. Does it mean a positive integer under 1000 that is divisible by only the numbers 7 and 11? ^***YES***
It means the set containing numbers divisible by 7 union the set containing the numbers divisible by 11
___________________________________________________________________________________________________________________
Can anybody help me out with 30h. Does the book mean only starts OR ends with BO or does it include the one the starts with AND ends with BO?
It wants to know starts OR ends with BO. Think of the equation for union for this problem. That being, # that start with BO + # that end with BO - # that start and end with BO.
I need some help with 44. Anyone know how to do it?
For 30h, "or" always means union
For 44, 1)there are 6 different consecutive positions. 2)on those consecutive positions there could be 1 or 0. 3)there are 2^5 ways to fill other positions. 4)then combine the above ideas together, and it is over to you
