Johanna is trying to find the probability that a cup will land open end up. She takes a cup and tosses it in the air 100 times and each time records if it lands open end up or open end down. She finds that 63 times the cup lands open end up. What is the probability that the cup will land open end down?
Responses
A 63100
63 100
B 37100
37 100
C 6363
D 37
The probability of the cup landing open end up is 63/100. The probability of it landing open end down would be 1 minus this probability, since there are only two possible outcomes (open end up or open end down). Therefore, the probability of the cup landing open end down is:
1 - 63/100 = 37/100
So the answer is B: 37/100.