If the four positive integers are selected randomly from the set of positive integers, then the probability that the number 1,3, 7 and 9 are in the un

Question

If the four positive integers are selected randomly from the set of positive integers, then the probability that the number 1,3, 7 and 9 are in the un

If the four positive integers are selected randomly from the set of positive integers, then the probability that the number 1,3, 7 and 9 are in the unit place in the product of 4 - digit, so selected is
A. ` (7 ) /(625 ) `
B. ` (2 ) /( 5 ) `
C. ` (5 )/( 625 ) `
D. ` (16 )/( 625 ) `

Monjur Alahi

8 views

2025-01-04 04:42

1 Answers

Related Questions

A letter is selected at random from the alphabet. What is the probability that it is one of the letters in the word "probability?" What is the probability that it occurs in the first half of the alphabet? What is the probability that it is a letter after \( x \) ?

2 Answers 6 Views

The probability that a certain kind of component will survive a check test is 0.5. Find the probability that exactly two of the next four components t

2 Answers 4 Views

Consider a collection of a large number of particles each with speed v. The direction of velocity is randomly distributed in the collection. Show that

2 Answers 5 Views

If in a trial the probability of success is twice the probability of failure. In six trials the probability of at least four successes is

2 Answers 4 Views

A random variable X is defined by `X={{:("3 with probability"=1/3),("4 with probability"=1/4),("12 with probability"=5/(12)"):}` Then, E(X) is

2 Answers 4 Views

A four digit number is to be formed using the digits 1,2,3, 4, 5,6,7 (no digit is being repeated in any number) . Then , the probability that it is `g

2 Answers 6 Views

The number of positive integers with the property that they cann be expressed as the sum of the cubes of 2 positive integers in two different ways is

2 Answers 4 Views

Statement-1: The total number of ways in which three distinct numbers in AP, can be selected from the set {1,2,3, . .,21}, is equal to 100. Statement-

2 Answers 4 Views

Two finite sets have m and n elements. The total number of subsets of the first set is 56 more than the total number of subsets of the second set. The

2 Answers 4 Views

Two finite sets have m and n elements. The total number of subsets of the first set is 48 more than the total number of subsets of the second set. The

2 Answers 4 Views

Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Correct Answer - D
The number of digits on unit place of any number = 10
` therefore " " n ( S) = 10 `
The necessary condition for becoming the digits 1, 3, 5 or 7 at the unit place of product of four numbers that the digits 1, 3 , 5 or 7 at unit place of every number.
` therefore n ( A) = 4 `
` therefore P ( A) = ( 4 ) /( 10 ) = ( 2 ) /( 5 ) `
So, required probability = ` ((2 )/( 5))^ 4 = (16 ) /( 625 ) `