Question : The average of D1 and D2 is 40. The average of D2 and D3 is 45. The average of D1 and D3 is 55. What is the value of D3?
Option 1: 60
Option 2: 45
Option 3: 50
Option 4: 55
New: SSC MTS Tier 1 Answer key 2024 out
Don't Miss: Month-wise Current Affairs | Upcoming Government Exams
New: Unlock 10% OFF on PTE Academic. Use Code: 'C360SPL10'
Correct Answer: 60
Solution : Given: The average of D1 and D2 is 40. The sum of D1 and D2 = 40 × 2 = 80 ---------------(1) The average of D2 and D3 is 45. The sum of D2 and D3 = 45 × 2 = 90 ----------------(2) The average of D1 and D3 is 55. The sum of D1 and D3 = 55 × 2 = 110 ------------(3) Adding the equation (1), (2) and (3), we get, D1 + D2 + D2 + D3 + D1 + D3 = 80 + 90 + 110 ⇒ 2 (D1 + D2 + D3) = 280 ⇒ D1 + D2 + D3 = 140 ⇒ 80 + D3 = 140 $\therefore$ D3 = 60 Hence, the correct answer is 60.
Application | Cutoff | Selection Process | Preparation Tips | Eligibility | Exam Pattern | Admit Card
Question : What is the value of 25 percent of 40 percent of $\frac{2}{7}$th of 2100?
Option 1: 40
Option 2: 60
Option 4: 45
Question : The average of T1 and T2 is 15. The average of T3 and T4 is 35. What is the average of T1, T2, T3, and T4?
Option 1: 24
Option 2: 30
Option 3: 28
Option 4: 25
Question : If the average of 20, 40, 50, Y and Z is 45, then what is the average of Y and Z?
Option 1: 58.5
Option 2: 57.5
Option 3: 56.5
Question : A bus travels 60 km in the first hour, 40 km in the second hour and 50 km in the third hour. What is the average speed of the bus?
Option 1: 60 km/hr
Option 2: 45 km/hr
Option 3: 50 km/hr
Option 4: 55 km/hr
Question : What is the third proportion of the numbers 15 and 30?
Option 1: 45
Option 2: 50
Option 3: 40
Option 4: 60
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile