16
The average of 20 results is 30 out of which the first 10 results are having an average of 10. The average age of the rest of 10 results is
- A50
- B40
- C20
- D25
Answer not set
Discussion 1
Log in or create a free account to reply and vote.
0
CCommunity
Total marks of 20 results = 20 × 30 = 600
Marks of first 10 results = 10 × 10 = 100
Marks of remaining 10 results = 600 - 100 = 500
∴ Average marks of rest 10 results = $(\frac{{500}}{{10}} = 50)$
∴ 50 is the average of rest 10 students.
Marks of first 10 results = 10 × 10 = 100
Marks of remaining 10 results = 600 - 100 = 500
∴ Average marks of rest 10 results = $(\frac{{500}}{{10}} = 50)$
∴ 50 is the average of rest 10 students.