Question : The average of 20 numbers is 30 and that of the other 30 numbers is 50. What is the average of all the numbers?
Option 1: 42
Option 2: 47
Option 3: 44
Option 4: 45
Answer (1)
18th Jan, 2024
Correct Answer: 42
Solution :
Total numbers = 20 + 30 = 50
Average = $\frac{(20×30)+(30×50)}{20+30}$
= $\frac{600+1500}{50}$
= $\frac{2100}{50}$
= $42$
Hence, the correct answer is 42.
Comments (0)
Related Questions
Know More about
Staff Selection Commission Multi Tasking ...
Application | Cutoff | Selection Process | Preparation Tips | Eligibility | Exam Pattern | Admit Card
Get Updates Brochure
Thank You!
Your Staff Selection Commission Multi Tasking Staff Exam brochure has been successfully mailed to your registered email id “”.
Upcoming Exams
Exam Date:
30 Sep, 2024
- 14 Nov, 2024
Application Date:
23 Sep, 2024
- 15 Nov, 2024
Tier II
Exam Date:
18 Nov, 2024
- 18 Nov, 2024
Mains Exam
Exam Date:
30 Nov, 2024
- 30 Nov, 2024
Mains Exam
Exam Date:
14 Dec, 2024
- 14 Dec, 2024
