mathsssssssssaaaaaaaaaaaaaaaa
posted by shayan .
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?

3/8 so 3+8=11
Respond to this Question
Similar Questions

Math
Pete is watching his ant farm one afternoon and observes that two ants walk away from each other at a 90 degree angle. After a few seconds, the first ant has traveled 3 inches and the second ant has traveled 4 inches. How far apart … 
physics
Three ants are sitting on the vertices of equilateral triangle of side a. At t=0 and ant 1 starts approaching ant 2 with a speed v ,ant 2 starts approaching ant 3 with a speed v, and ant 3 starts approaching ant 1 with speed v.The … 
science
an ant walk 4cm east get some rest and continues for another 3cm in the same direction what is the displacement traveled by the ant? 
math
an ant walks 30 feet in 6 minutes. how long will it take the ant to walk 35 yards? 
PreCalc/Trig...
Let y = 4t + 2 be a linear function representing the distance from home for an ant t minutes after starting out from a location near its home. What does the number 4 represent in this function? 
Calculus
An ant is walking along the curve x^2+xy+y^2=19. If the ant is moving to the right at the rate of 3 centimeters/second, how fast is the ant moving up or down when the ant reaches the point (2,3)? 
Geometry
An ant starts at a foot of a staircase and crawls to the base of the fourth step. If each step is 8 inches tall and 10 inches wide, how far is the ant from where it began? 
fables
The grasshopper and the ant (la cigale et la fourmi) 1) Why is the ant well prepared for the winter 2) Why the ant refuse the request of the grassshopper 
Math Probability
An ant begins at the top of the pictured octahedron. If the ant takes two "steps", what is the probability it ends up at the bottom of the octahedron? 
Calculus
Two ants, red ant and black ant, creeping along lines in 3space. At time t, red ant is at point on the line x=3t , y2=2t , z2t=6 and at the same time t, black ant is at the point on the line 2x=t , y3t=2 , z=2+t a) Find the starting …