how many chords can be done 25 points on circle with steps
Answers
Answer:
event A can be done in '5 ways and Giant B can be done in 10 ways then in
how many ways can events A and B'be done ?
event A can be done in '5 ways and Giant B can be done in 10 ways then in
how many ways can events A and B'be done ?
event A can be done in '5 ways and Giant B can be done in 10 ways then in
how many ways can events A and B'be done ?
event A can be done in '5 ways and Giant B can be done in 10 ways then in
how many ways can events A and B'be done ?
Answer:
Pick a point. From that point you can draw a chord to each of the other 19 without duplicating an existing chord (there are no others yet)
Pick a second point, from this one, you can draw a chord to 18 other chords, but not to the one you already picked earlier, as it drew a line to this point already.
Clearly you can repeat this all the way down to until your last point can draw no new lines.
So 19+18…+1
Now, you can pair up 19 with 1, 18 with 2, and so forth down to 11+9, each pair sums to 20, so that’s 180 chords, but there are ten chords remaining, so that’s a grand total of 190
ᴀɴsᴡᴇʀ ɪs 190!!
ʜᴏᴘ ɪᴛs ʜᴇʟᴘ ʏᴏᴜ...