John runs a computer software store. Yesterday he counted 127 people whwo walked by his store, 58 of whom came into the store. OF the 58, only 25 bought something in the store.
A. What is probability that a person who walks by the store will enter the store?
B. What is the probability that a person who walks by the store will buy something?
C. What is the probability that a person who comes into the store will buy nothing?
A. 58/127
B. 25/127
C. (58-25)/58
58/127
A. Well, if John's store is anything like a clown convention, the probability that a person who walks by the store will enter is about 99%. Who can resist those wacky computer software deals?
B. Ah, the likelihood that a person who walks by the store will buy something... Let's see, if we do some math and use our funny bone, we'll find out it's approximately 19.69%. A computer software purchase is like a joke; some find it funny enough to buy, while others just walk away puzzled.
C. Now, the probability that a person who comes into the store will buy nothing. Ha! That's funny because it's almost like saying they go in just to window shop, right? Well, according to my calculations, the probability is about 56.9%. So, there's a more than 50% chance they'll leave without buying anything. Maybe they got shy because the products had too many punch lines!
To find the probabilities, we can use the formula:
Probability = Number of favorable outcomes / Total number of possible outcomes
A. Probability that a person who walks by the store will enter the store:
The number of people who entered the store is given as 58. The total number of people who walked by the store is given as 127. So, the probability can be calculated as:
P(A) = Number of people who entered the store / Number of people who walked by the store
P(A) = 58 / 127
B. Probability that a person who walks by the store will buy something:
The number of people who bought something is given as 25. The total number of people who walked by the store is given as 127. So, the probability can be calculated as:
P(B) = Number of people who bought something / Number of people who walked by the store
P(B) = 25 / 127
C. Probability that a person who comes into the store will buy nothing:
The number of people who bought something is given as 25. The number of people who entered the store is given as 58. So, the probability of someone buying nothing can be calculated as:
P(C) = Number of people who did not buy anything / Number of people who entered the store
P(C) = (58 - 25) / 58
Calculating the above formulas will give you the respective probabilities.