B. 15
Each spinner has a 50% chance of landing on a direction that would cause the player to move backwards. Therefore, out of 40 turns, we would expect Brett to move backwards on approximately 20 turns. However, since both spinners need to land on a direction that would cause Brett to move backwards in order for him to move backwards, the probability of moving backwards on any given turn is actually lower than 50%. Therefore, 15 out of 40 turns is a reasonable prediction for the number of times Brett will move backwards at least 1 space.
Jay and Brett are using the spinners shown to play a board game. For each turn, a player must spin both spinners to determine what direction to move and how many spaces to move.%0D%0A%0D%0A%0D%0A%0D%0A%0D%0A%0D%0A%0D%0AWhat is a reasonable prediction for the number of turns that Brett will move backwards at least 1 space out of 40 turns?
A. 10
B. 15
C. 30
D. 20
1 answer
1 answer