Posted by **shayan** on Thursday, July 18, 2013 at 3:00am.

An ant starts a random walk on the real number line at 0. At each step, the ant moves by +1 or −1 with equal probability. After 6 moves, the probability that the ant is on a positive number can be expressed as a/b, where a and b are positive coprime integers. What is the value of a+b?

- mathsssssssssaaaaaaaaaaaaaaaa -
**Anonymous**, Sunday, July 21, 2013 at 3:44pm
3/8 so 3+8=11

## Answer this Question

## Related Questions

- Calculus - An ant is walking along the curve x^2+xy+y^2=19. If the ant is moving...
- physics - Three ants are sitting on the vertices of equilateral triangle of side...
- Pre-Calc/Trig... - Let y = 4t + 2 be a linear function representing the ...
- Math - Pete is watching his ant farm one afternoon and observes that two ants ...
- math - an ant walks 30 feet in 6 minutes. how long will it take the ant to walk ...
- Geometry - An ant starts at a foot of a staircase and crawls to the base of the ...
- science - an ant walk 4cm east get some rest and continues for another 3cm in ...
- heeeeeelp maths - An ant is walking along the cartesian plane. It starts at the ...
- Physics HELP! - An ant and a beetle are riding a spinning record on a record ...
- Physics - An ant walks on a piece of graph paper straight along the x axis a ...