What is the probability of riding in a red Ferris-wheel cabin?

Question

Misha and his father decide to ride a Ferris wheel. It has 26 cabins: 6 blue, 7 green, and the rest red. The cabins arrive at the boarding platform one by one. Find the probability that Misha rides in a red cabin. Give only a number.

Explanation

There are 26 cabins. The number of red cabins is:

26 − 6 − 7 = 13.

Assuming every cabin is equally likely, divide the number of red cabins by the total:

P = 13/26 = 1/2 = 0.5.