Question

There are 4 keys on a keychain. One of the keys starts a car. If a key is randomly chosen, what is the probability that it starts the car
A)15% B)25% C)20% D)5%

Answer 1

B because 4 keys 100÷4 is 25 and that's 1 key starts a car

Answer 2

Answer: B)25%

Step-by-step explanation:

Given : Total number of keys in a key chain = 4   (Total outcomes)

The number of right key to start the car = 1    (Favorable outcome)

Now,  If a key is randomly chosen, then the probability that it starts the car  is given by :-

$\dfrac{\text{Favorable outcomes}}{\text{Total outcomes}}\\\\=\dfrac{1}{4}=0.25$

In percent, $0.25\times100=25\%$

Hence, the required probability = 25%.