Question 9
Back to Exercise
In how many ways can 4 numbers be chosen from 1 to 10 so that no two of them are consecutive?
- A 35 Correct
- B 210
- C 70
- D 56
Correct Answer: Option A
Choosing r non-consecutive from n: (n − r + 1)Cr
(10 − 4 + 1)C4 = 7C4 = 35
Answer: 35
Discussion & Comments 0
Share your method, a shortcut, or ask about a step you didn't follow.
No comments yet. Be the first to share your solution!