Question

A bag contains 18 blocks numbered from 1 to 18. Two blocks are selected from the bag at the same time. Let event E = the two numbers differ by 11. How many outcomes are in E? A) 7 B) 14 C) 28 D) 292

Answer 1

A) 7

Explanation:

E is when the numbers differ by 11, so these pairs work:

(1, 12), (2, 13), (3, 14), (4, 15), (5, 16), (6, 17), (7, 18)

Thus, there are 7 outcomes where the numbers differ by 1

Answer 2

the correct answer is A 7