nice problem. it is easy but there is a high chance of making calculation mistake. it is painful to loose marks due to calculation mistakes. we cannot use generating series here. i dont see any way to use polynomials here.
Wait i don't think that is correct. I think it should be a multiple of 5 because you need to multiply by 5 to get the number of ways. The only answer choice is E because 2400 is the only multiple of 5. You got the right answer but I don't think you used the right method.
Also, since this is AMC, after being done with level X, I think we can choose option E because it's the only multiple of 5.
the way richard moves his finger along the paths is so smooth 😍😍
nice problem. it is easy but there is a high chance of making calculation mistake. it is painful to loose marks due to calculation mistakes. we cannot use generating series here. i dont see any way to use polynomials here.
Srikanth Tupurani
Just find the multiple of 5
so funny and informative! lovin' it!
thanks! you helped me a lot!
He's awesome
great professor!!!
sorry 20=2400
@elflordbob1 Chuck Testa
first comes 5+5+5+5=20 so it would be multiple of 2, =2400
Wait i don't think that is correct. I think it should be a multiple of 5 because you need to multiply by 5 to get the number of ways. The only answer choice is E because 2400 is the only multiple of 5. You got the right answer but I don't think you used the right method.
@@lukeqiao5477 I think he meant multiple of 20