Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • Calculate the number of ways 2 numbers can be chosen from the set containing perfect square positive integers till 111 and multiplied together to obtain a product that is a multiple of 4 or 6.

Calculate the number of ways 2 numbers can be chosen from the set containing perfect square positive integers till 111 and multiplied together to obtain a product that is a multiple of 4 or 6.

 

Option: 1

3


Option: 2

8


Option: 3

6


Option: 4

4


Answers (1)

best_answer

To calculate the number of ways two numbers can be chosen from the set of perfect square positive integers up to 111 and multiplied together to obtain a product that is a multiple of 4 or 6, we need to consider the factors of 4 and 6.

Perfect square positive integers up to 111 are:

1, 4, 9, 16, 25, 36, 49, 64, 81, 100

To find the numbers that are multiples of 4 and 6, we need to find their common multiples.

The common multiples of 4 and 6 are: 12, 24, 36, 48, 60, 72, 84, 96, 108

Now, let's count the number of perfect square positive integers in this set that are multiples of 4 and 6.

Numbers that are perfect squares and multiples of 4 and 6: 36, 64, 100

To choose two numbers from this set, we can use the formula for combinations:
\mathrm{n C r=n ! /(r !(n-r) !)}
Therefore, the number of ways to choose two numbers from the set of perfect square positive integers up to 111 and multiplied together to obtain a product that is a multiple of 4 or 6 is (3 choose 2) = 3 ways.

Thus, there are 3 ways to choose two numbers from the set of perfect square positive integers up to 111 such that their product is a multiple of 4 or 6.

 


 

 

Posted by

chirag

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

JEE Main 2025: NIT Andhra Pradesh cut-offs drop for CSE, ECE, other BTech programmes this year; closing rank
anam-khan

JEE Main 2025 Live: Exam city slip soon at jeemain.nta.nic.in; admit card date, cut-off updates
anam-khan

BTech Admissions 2025: GUJCET registration ends on December 31; JEE Main, AEEE, WBJEE, SRMJEEE exam date

Latest Question