Question
In an examination the average marks of Rohit is 60. If
he got 15 more marks in science and 21 more marks in maths then his average would have been 66. Find the total number of subjects he studied?Solution
Let total number of subjects be x. Then, => (60x + 21 + 15)/x = 66 => 60x + 21 + 15 = 66x => 6x = 36 => x = 6
More Average Questions
140 150 175 185 210 225
...8, 7, 12, 35, 128, 635
3 4 18 72 360 2160
120, 240, 80, 320, 60, 384
72, 36, 54, 135, 470.5, 2126.25
- Find the wrong number in the given number series.
2, 10, 12, 36, 38, 34 131, 212, 261, 286, 295, 299
147 490 707 831 895 922 930
...Find the wrong number in the series.
5, 12, 23, 38, 57, 80, 107- Find the wrong number in the given number series.
3, 6, 10, 15, 21, 29
Relevant for Exams:
