What is the probability that the number selected does not contain zero at any position ?
For the next five (05) items that follow : A 4-digit number is selected at random formed by using the digits 0, 1, 2, 3 and 4 (where repetition of digits is not allowed).
- A. 0.12
- B. 0.25 ✓
- C. 0.375
- D. 0.45
Correct Answer: B. 0.25
Explanation
If the number does not contain 0, it must be formed entirely of the digits {1, 2, 3, 4}. The number of such 4-digit combinations is 4! = 24. The probability is 24/96 = 1/4 = 0.25.
Related questions on Statistics & Probability
- Let x be the mean of squares of first n natural numbers and y be the square of mean of first n natural numbers. If $\frac{x}{y}=\fra...
- What is the probability of getting a composite number in the list of natural numbers from 1 to 50?
- Two numbers x and y are chosen at random from a set of first 10 natural numbers. What is the probability that (x+y) is divisible by 4?
- A number x is chosen at random from first n natural numbers. What is the probability that the number chosen satisfies $x+\frac{1}{x} \gt...
- Three fair dice are tossed once. What is the probability that they show different numbers that are in AP?