Operations on numbers - Average
The average of 4 numbers is 25. When the fifth number is added, the average becomes 30. What is the fifth number?
A
50
B
45
C
55
D
60
A team's average in 5 matches is 48. The average of the first 4 matches excluding the last match is 50. How many runs scored in the last match?
A
40
B
42
C
38
D
45