Selected MCQ

Current Question
In a class with 20 boys and 25 girls, how many pairs of one boy and one girl can be formed?
  • A. 400
  • B. 500
  • C. 600
  • D. 20
Correct Answer: B
Explanation:
20 × 25 = 500 paiRs.
Related Question 1
In how many ways can 5 boys and 3 girls sit in a row such that all boys sit together?
  • A. 4800
  • B. 5760
  • C. 2880
  • D. 15000
Correct Answer: C
Explanation:
Treat boys as one unit → 4!×5! = 2880.
Related Question 2
If the ratio of boys to girls is 2:3 and the total number of students is 50, how many girls are there?
  • A. 20
  • B. 25
  • C. 30
  • D. 35
Correct Answer: C
Explanation:
Total parts = 5 ⇒ girls = 3×10 = 30.
Related Question 3
Chocolates are distributed among boys and girls. What is the ratio?
  • A. 70:50
  • B. 60:60
  • C. 50:70
  • D. 40:80
Correct Answer: B
Explanation:
Equal distribution.
Related Question 4
If the ratio of boys to girls is 3:2 and total students are 50, number of girls ____.
  • A. 10
  • B. 15
  • C. 20
  • D. 25
Correct Answer: C
Explanation:
Total parts = 5.
Related Question 5
The product of two numbers is 2028, and their HCF is 13. How many such pairs exist?
  • A. 1
  • B. 2
  • C. 3
  • D. 4
Correct Answer: B
Explanation:
Factorization yields two valid coprime pairs.