180
edits
Changes
Jump to navigation
Jump to search
Line 98:
Line 98: − + − Line 113:
Line 112: − +
Activity-permutations and combinations problems (view source)
Revision as of 06:09, 11 July 2014
, 06:09, 11 July 2014→Problem 3
<math>{^{8}}C_{2}</math>=4X7<br>
<math>{^{8}}C_{2}</math>=4X7<br>
<math>{^{8}}C_{2}</math>=28 numbers
<math>{^{8}}C_{2}</math>=28 lines can drawn
*For drawing a triangle we need 3 non co-linear points hence selecting 3 points out of 8 given we have<br>
*For drawing a triangle we need 3 non co-linear points hence selecting 3 points out of 8 given we have<br>
<math>{^{8}}C_{3}</math> combinations<br>
<math>{^{8}}C_{3}</math> combinations<br>
<math>{^{8}}C_{2}</math>=8X7<br>
<math>{^{8}}C_{2}</math>=8X7<br>
<math>{^{8}}C_{2}</math>=56 numbers
<math>{^{8}}C_{2}</math>=56 triangles can be drawn