Question
The average score of 20 students in a test is 65. Later
it is found that the score of one student was wrongly taken as 54 instead of 84. What will be the correct average?Solution
Wrong total = 20 × 65 = 1300 Correct total = 1300 − 54 + 84 = 1300 + 30 = 1330 Correct average = 1330 / 20 = 66.5 Hence, Correct average = 66.5.
More Average Questions
3, 5, 12, 38, 154, ?
What will come in place of the question mark (?) in the following series?
132, 101, 130, ?, 126, 109
12, 24, 46, 78, 120, ?
25 25 37.5 ? 328.125 1804.6875
124, 128, ?, 135, 110, 146
155, 157, 160, ?, 172, 183
22, 37, 63, 98, 148, ?
What will come in place of the question mark (?) in the following series?
1.5, 3.5, 9.5, 27.5, 81.5, 243.5, ?
72, 82, 62, 102, 22, ?
5, 6, 14, 45, ?, 925
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